Spin-quartet Ground State Research Articles

Synthesis and Characterization of π-Extended Triangulene.

The electronic and magnetic properties of nanographenes strongly depend on their size, shape and topology. While many nanographenes present a closed-shell electronic structure, certain molecular topologies may lead to an open-shell structure. Triangular-shaped nanographenes with zigzag edges, which exist as neutral radicals, are of considerable interest both in fundamental science and for future technologies aimed at harnessing their intrinsic high-spin magnetic ground states for spin-based operations and information storage. Their synthesis, however, is extremely challenging owing to the presence of unpaired electrons, which confers them with enhanced reactivity. We report a combined in-solution and on-surface synthesis of π-extended triangulene, a non-Kekulé nanographene with the structural formula C33H15, consisting of ten benzene rings fused in a triangular fashion. The distinctive topology of the molecule entails the presence of three unpaired electrons that couple to form a spin quartet ground state. The structure of individual molecules adsorbed on an inert gold surface is confirmed through ultrahigh-resolution scanning tunneling microscopy. The electronic properties are studied via scanning tunneling spectroscopy, wherein unambiguous spectroscopic signatures of the spin-split singly occupied molecular orbitals are found. Detailed insight into its properties is obtained through tight-binding, density functional and many-body perturbation theory calculations, with the latter providing evidence that π-extended triangulene retains its open-shell quartet ground state on the surface. Our work provides unprecedented access to open-shell nanographenes with high-spin ground states, potentially useful in carbon-based spintronics.

He2+ molecular ion and the He− atomic ion in strong magnetic fields

We study the question about existence i.e. stability with respect to dissociation of the spin-quartet, permutation- and reflection-symmetric ${}^4(-3)^+_g$ ($S_z=-3/2, M=-3$) state of the $(\alpha\alpha e e e)$ Coulomb system: the ${\rm He}_2^+$ molecular ion, placed in a magnetic field $0 \le B \le 10000$ a.u. We assume that the $\alpha$-particles are infinitely massive (Born-Oppenheimer approximation of zero order) and adopt the parallel configuration, when the molecular axis and the magnetic field direction coincide, as the optimal configuration. The study of the stability is performed variationally with a physically adequate trial function. To achieve this goal, we explore several Helium-contained compounds in strong magnetic fields, in particular, we study the spin-quartet ground state of ${\rm He}^-$ ion, and the ground (spin-triplet) state of the Helium atom, both for a magnetic field in $100 \leq B\leq 10000$ a.u. The main result is that the ${\rm He}_2^+$ molecular ion in the state ${}^4(-3)^+_g$ is stable towards all possible decay modes for magnetic fields $B \gtrsim 120$ a.u. and with the magnetic field increase the ion becomes more tightly bound and compact with a cigar-type form of electronic cloud. At $B=1000$ a.u., the dissociation energy of ${\rm He}_2^+$ into ${\rm He}^- + \alpha$ is $\sim 701.8$ eV and the dissociation energy for the decay channel to ${\rm He} + \alpha + e $ is $\sim 729.1$ eV, latter both energies are in the energy window for one of the observed absorption features of the isolated neutron star 1E1207.4-5209.

Vanadocene de Novo: Spectroscopic and Computational Analysis of Bis(η5-cyclopentadienyl)vanadium(II)

The magnetic and electronic properties of the long-known organometallic complex vanadocene (VCp2), which has an S = 3/2 ground state, were investigated using conventional (X-band) electron paramagnetic resonance (EPR) and high-frequency and -field EPR (HFEPR), electronic absorption, and variable-temperature magnetic circular dichroism (VT-MCD) spectroscopies. Frozen toluene solution X-band EPR spectra were well resolved, yielding the 51V hyperfine coupling constants, while HFEPR were also of outstanding quality and allowed ready determination of the rigorously axial zero-field splitting of the spin quartet ground state of VCp2: D = +2.836(2) cm–1, g⊥ = 1.991(2), g∥ = 2.001(2). Electronic absorption and VT-MCD studies on VCp2 support earlier assignments that the absorption signals at 17 000, 19 860, and 24 580 cm–1 are due to ligand-field transitions from the 4A2g ground state to the 4E1g, 4E2g, and 4E1g excited states, using symmetry labels from the D5d point group (i.e., staggered VCp2). Contributions to...

First-principles prediction of optical second-order harmonic generation in the endohedralN@C60compound

Non-linear-optical properties in ${\mathrm{C}}_{60}$ have attracted enormous attention for over two decades. The endohedral complex $\mathrm{N}@{\mathrm{C}}_{60}$, with its remarkable thermal stability and spin-quartet ground state, is a candidate for future room-temperature quantum computing, but there has been no investigation of its non-linear-optical properties. Here, a first-principles calculation shows that $\mathrm{N}@{\mathrm{C}}_{60}$ is a promising material for nanoscale and ultrafast modulations. Excitation by a pump laser pulse of the nitrogen-atom vibration inside the ${\mathrm{C}}_{60}$ cage transiently breaks inversion symmetry and can enable second-harmonic generation (SHG) from a probe pulse. Unlike the SHG observed in ${\mathrm{C}}_{60}$ thin films, this harmonic signal is switched on and off periodically every 345 fs. For an fcc crystal of $\mathrm{N}@{\mathrm{C}}_{60}$, the second-order susceptibility ${\ensuremath{\chi}}^{(2)}$ is on the order of ${10}^{\ensuremath{-}8}\phantom{\rule{0.28em}{0ex}}\mathrm{esu}$, similar to commercially used nonlinear materials.

The Classic “Brown-Ring” Reaction in a New Medium: Kinetics, Mechanism, and Spectroscopy of the Reversible Binding of Nitric Oxide to Iron(II) in an Ionic Liquid

To elucidate the applicability and properties of ionic liquids (ILs) to serve as chemical reaction media for the activation of small molecules by transition-metal complexes, detailed kinetic and mechanistic studies were performed on the reversible binding of NO to FeCl(2) dissolved in the IL 1-ethyl-3-methylimidazolium dicyanamide ([emim][dca]) as a solvent. We report, for the first time, the application of laser flash photolysis at ambient and high pressure to study the kinetics of this reaction in an IL. The kinetic data and activation parameters for the "on" and "off" reactions suggest that both processes follow a limiting dissociative (D) ligand substitution mechanism, in contrast to that reported for the same reaction in aqueous solution, where this well-known "brown-ring" reaction follows an interchange dissociative (I(d)) ligand substitution mechanism. The observed difference apparently arises from the participation of the IL anion as a N-donor ligand, as evidenced by the formation of polymeric [Fe(dca)(3)Cl](x)[emim](2x) chains in the solid state and verified by X-ray crystallography. In addition, infrared (IR), Mössbauer, and EPR spectra were recorded for the monomeric reaction product [Fe(dca)(5)NO](3-) formed in the IL, and the parameters closely resemble those of the {FeNO}(7) unit in other well-characterized nitrosyl complexes. It is concluded that its electronic structure is best described by the presence of a high-spin Fe(III) (S = 5/2) center antiferromagnetically coupled to NO(-) (S = 1), yielding the observed spin quartet ground state (S(t) = 3/2).

Tridentate Facial Ligation of Tris(pyridine-2-aldoximato)nickel(II) and Tris(imidazole-2-aldoximato)nickel(II) To Generate NiIIFeIIINiII, MnIIINiII, NiIINiII, and ZnIINiIIand the Electrooxidized MnIVNiII, NiIINiIII, and ZnIINiIIISpecies: A Magnetostructural, Electrochemical, and EPR Spectroscopic Study

Eight hetero- and homometal complexes 1-6, containing the metal centers Ni(II)Fe(III)Ni(II) (1), Mn(III)Ni(II) (2), Ni(II)Ni(II) (3a-c and 4), Zn(II)Ni(II) (5), and Zn(II)Zn(II) (6), are described. The tridentate ligation property of the metal complexes tris(pyridine-2-aldoximato)nickel(II) and tris(1-methylimidazole-2-aldoximato)nickel(II) with three facially disposed pendent oxime O atoms has been utilized to generate the said complexes. Complex 1 contains metal centers in a linear arrangement, as is revealed by X-ray diffraction. Complexes were characterized by various physical methods including cyclic voltammetry (CV), variable-temperature (2-290 K) magnetic susceptibility, electron paramagnetic resonance (EPR) measurements, and X-ray diffraction methods. Binuclear complexes 2-6 are isostructural in the sense that they all contain a metal ion in a distorted octahedral environment MN(3)O(3) and a second six-coordinated Ni(II) ion in a trigonally distorted octahedral NiN(6) geometry. Complexes 1-4 display antiferromagnetic exchange coupling of the neighboring metal centers. The order of the strength of exchange coupling in the isostructural Ni(II)2 complexes, 3a-c, and 4, demonstrates the effects of the remote substituents on the spin coupling. The electrochemical measurements CV and square wave voltammograms (SQW) reveal two reversible metal-centered oxidations, which have been assigned to the Ni center ligated to the oxime N atoms, unless a Mn ion is present. Complex 2, Mn(III)Ni(II), exhibits a reduction of Mn(III) to Mn(II) and two subsequent oxidations of Mn(III) and Ni(II) to the corresponding higher states. These assignments of the redox processes have been complemented by the X-band EPR measurements. That the electrooxidized species [3a]+, [3b]+, [3c]+, and [4]+ contain the localized mixed-valent NiIINiIII system resulting from the spin coupling, a spin quartet ground state, S(t) = 3/2, has been confirmed by the X-band EPR measurements.

Proof of Large Positive Zero-Field Splitting in a Ru25+ Paddlewheel

We present the synthesis, as well as the structural and magnetic characterization, of [Ru2(D(3,5-Cl2Ph)F)4Cl(0.5H2O)].C6H14 (D(3,5-Cl2Ph)F = N,N'-di(3,5-dichlorophenyl)formamidinate), a Ru2(5+) compound having a 4B(2u) ground state derived from a sigma2pi4delta2pi2delta electron configuration. The persistence of this configuration from 27 to 300 K is shown by the invariance of the Ru-Ru distance. Orientation-dependent magnetic susceptibility (chiT) and magnetization (M(H)) data are in accord with a spin quartet ground state with large magnetocrystalline anisotropy associated with a large axial zero-field splitting (D) parameter. Theoretical fits to chiT and M(H) plots yielded D/kB = +114 K, implying an S = +/-1/2 Kramers doublet ground state at low temperature. Single-crystal and powder EPR data are consistent with this result, as the only observed transition is between the M(s) = +/1/2 Zeeman levels. The g values are g(perpendicular) = 2.182, g(parallel) = 1.970, and D = 79.8 cm(-1). The totality of the results demands D >> 0.

Three-Electron Systems in Quantum Nanostructures: Ground State Transition from a Spin-Doublet State to a Spin-Quartet State

The ground state and the lowest excited state of three electrons confined in quantum structures (quantum dots) are calculated. In general, the ground state is a spin-doublet one in a small dot, level crossing occurs as the dot size increases, and the ground state is a spin-quartet state in a large dot. It is found that the spin-quartet ground state is more likely to be realized in a quantum ring (QR) than in a harmonic confinement. In a narrow QR, two-electron exchanges are unlikely to occur because of the large Coulomb barrier while three-electron exchanges are little suppressed, leading to the fully spin-polarized (spin-quartet) ground state. The present calculation conforms to Herring's theorem that the ground state of three spin-1/2 fermions on a one-dimensional ring is a fully spin-polarized one if the repulsive interaction between fermions is sufficiently strong. The extensions of the present result to more complicated cases are also discussed.

On the “Brown‐Ring” Reaction Product via Density‐Functional Theory.

On the basis of the density-functional theory, the properties of the reaction product [Fe(H2O)5(NO)]2+ of the classical “brown-ring” reaction are studied via the B3LYP hybrid method. Here we have found that the Fe−N−O bond in the optimized structure of [Fe(H2O)5(NO)]2+ is linear. In addition, the vibrational frequency, atomic net charges, and spin density are analyzed and then the solvent effects are incorporated via the polarized continuum model self-consistent reaction field. Furthermore, the excitation energies are evaluated using the CIS method. Results when compared with experimental data indicate that the spin-quartet ground state of [Fe(H2O)5(NO)]2+ is best described by the presence of FeII (S = 2) antiferromagnetically coupled to NO (S = 1/2), yielding [FeII(H2O)5(NO)]2+. This is clearly different from either [FeIII(H2O)5(NO-)]2+ or conventional textbook [FeI(H2O)5(NO+)]2+ assignment.

On the “Brown-Ring” Reaction Product via Density-Functional Theory

On the basis of the density-functional theory, the properties of the reaction product [Fe(H2O)5(NO)]2+ of the classical “brown-ring” reaction are studied via the B3LYP hybrid method. Here we have found that the Fe−N−O bond in the optimized structure of [Fe(H2O)5(NO)]2+ is linear. In addition, the vibrational frequency, atomic net charges, and spin density are analyzed and then the solvent effects are incorporated via the polarized continuum model self-consistent reaction field. Furthermore, the excitation energies are evaluated using the CIS method. Results when compared with experimental data indicate that the spin-quartet ground state of [Fe(H2O)5(NO)]2+ is best described by the presence of FeII (S = 2) antiferromagnetically coupled to NO (S = 1/2), yielding [FeII(H2O)5(NO)]2+. This is clearly different from either [FeIII(H2O)5(NO-)]2+ or conventional textbook [FeI(H2O)5(NO+)]2+ assignment.

Thermal Behaviour of Some Iron(III) Complexes with Active Therapeutically Biguanides

Two iron(III) complexes with therapeutically active biguanides - N',N'-anhydrobis-(beta-oxyethyl) biguanide (HMBig), and N',N'-dimethylbiguanide (HMetf), respectively - [Fe(HMBig)3]Cl3·9H2O (I) and [Fe(HMBig)(HMetf)]Cl3·6H2O (II) - were synthesized and characterized through elemental analysis, electrical conductivity, IR and UV/VIS spectroscopy, measurements in magnetic field and non-isothermal analysis. In studied complexes the biguanide derivatives act as bidentate ligands through nitrogen atoms of the iminic groups. Their magnetic moments correspond to iron(III) in the spin quartet ground state. The thermal analysis evidenced an endotherm release of crystallization and coordinated water molecules. The degradation of the ligand molecules is a complex one, several processes being overlapped. The presence of biguanidic ligand increase the thermal stability of the coordination compound. The final product of both thermal decompositions is a-Fe2O3.

Kinetics, mechanism, and spectroscopy of the reversible binding of nitric oxide to aquated iron(II). An undergraduate text book reaction revisited.

A detailed kinetic and mechanistic analysis of the classical "brown-ring" reaction of [Fe(H(2)O)(6)](2+) with NO was performed using stopped-flow and laser flash photolysis techniques at ambient and high pressure. The kinetic parameters for the "on" and "off" reactions at 25 degrees C were found to be k(on) = 1.42 x 10(6) M(-1) s(-1), DeltaH(++)(on) = 37.1 +/- 0.5 kJ mol(-1), DeltaS(++)(on) = -3 +/- 2 J K(-1) mol(-1), DeltaV(++)(on) = +6.1 +/- 0.4 cm(3) mol(-1), and k(off) = 3240 +/- 750 s(-1), DeltaH(++)(off) = 48.4 +/- 1.4 kJ mol(-1), DeltaS(++)(off) = -15 +/- 5 J K(-1) mol(-1), DeltaV(++)(off) = +1.3 +/- 0.2 cm(3) mol(-1). These parameters suggest that both reactions follow an interchange dissociative (I(d)) ligand substitution mechanism, which correlates well with the suggested mechanism for the water exchange reaction on [Fe(H(2)O)(6)](2+). In addition, Mössbauer spectroscopy and EPR measurements were performed on the reaction product [Fe(H(2)O)(5)(NO)](2+). The Mössbauer and EPR parameters closely resemble those of the [FeNO](7) units in any of the other well-characterized nitrosyl complexes. It is concluded that its electronic structure is best described by the presence of high-spin Fe(III) antiferromagnetically coupled to NO(-) (S = 1) yielding the observed spin quartet ground state (S = (3)/(2)), i.e., [Fe(III)(H(2)O)(5)(NO(-))](2+), and not [Fe(I)(H(2)O)(5)(NO(+))](2+) as usually quoted in undergraduate text books.

Oxamato-bridged trinuclear Ni(II)Cu(II)Ni(II) complexes with irregular spin state structures and a binuclear Ni(II)Cu(II) complex with an unusual supramolecular structure: crystal structure and magnetic properties.

Four oxamato-bridged heterotrinuclear Ni(II)Cu(II)Ni(II) complexes of formula ([Ni(bispictn)](2)Cu(pba))(ClO(4))(2).2.5H(2)O (1), ([Ni(bispictn)](2)Cu(pbaOH))(ClO(4))(2).H(2)O (2), ([Ni(cth)](2)Cu(pba))(ClO(4))(2) (3), and ([Ni(cth)](2)Cu(opba))(ClO(4))(2).H(2)O (4) and a binuclear Ni(II)Cu(II) complex of formula [Cu(opba)Ni(cth)].CH(3)OH (5) have been synthesized and characterized by means of elemental analysis, IR, ESR, and electronic spectra, where pba = 1,3-propylenebis(oxamato), pbaOH = 2-hydroxyl-1,3-propylenebis(oxamato), opba = o-phenylenebis(oxamato), bispictn = N,N'-bis(2-pyridylmethyl)-1,3-propanediamine, and cth = rac-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane. The crystal structures of 1, 3, and 5 have been determined. The structures of complexes 1 and 3 consist of trinuclear cations and perchlorate anions, and that of 5 consists of neutral binuclear molecules which are connected by hydrogen bonds and pi-pi interactions to produce a unique supramolecular "double" sheet. In the three complexes, the copper atom in a square-planar or axially elongated octahedral environment and the nickel atom in a distorted octahedral environment are bridged by the oxamato groups, with Cu.Ni separations between 5.29 and 5.33 A. The magnetic properties of all five complexes have been investigated. The chi(M)T versus T plots for 1-4 exhibit the minimum characteristic of antiferromagnetically coupled NiCuNi species with an irregular spin state structure and a spin-quartet ground state. The chi(M)T versus T plot for 5 is typical of an antiferromagnetically coupled NiCu pair with a spin-doublet ground state. The Ni(II)-Cu(II) isotropic interaction parameters for the five complexes were evaluated and are between 102 and 108 cm(-)(1) (H = -JS(Cu).S(Ni)).

Magnetic and spectral properties of two five-coordinate Lewis-base adducts of cobalt(II) Schiff-base complexes with a N 3O 2 ligand environment

Two new five-coordinate Lewis-base adducts of cobalt(II) N 2O 2 Schiff-base complexes, [Co(Salpad) 2( t-MeStpy)] and [Co(H 2(fsa) 2phn)( t-MeStpy)]·0.5H 2O (where H(Salpad)=2-[ N-(4-phenylaminophenyl)formimidoyl]phenol, H 4(fsa) 2phn= N,N′- o-phenylenebis(3-carboxysalicylaldimine), and t-MeStpy= trans-1-(4-methylphenyl)-2-(4-pyridyl)ethene), have been synthesized in order to investigate the influence of the in-plane donor atom topology on the spin-state of the cobalt(II) ion. The compounds have been characterized by analytical and spectroscopic methods. The spin-state behavior of cobalt(II) was investigated by variable-temperature magnetic susceptibility measurements over the temperature range 10–380 K. For [Co(Salpad) 2( t-MeStpy)] the magnetic data indicate a spin-quartet ground state which can be described using an axial spin Hamiltonian ( D=16.57 cm −1, g=2.39 for CoN 2O 2N′) with additional temperature-independent paramagnetism ( Nα=360×10 −6 cm 3 mol −1). The compound [Co(H 2(fsa) 2phn)( t-MeStpy)]·0.5H 2O undergoes a thermally-induced S=1/2↔ S=3/2 spin equilibrium at high temperatures. The magnetic properties of the four-coordinate [Co(Salpad) 2] precursor are also reported here.

Electron depolarization by inelastic exchange scattering from Cr3+ magnetic moments.

Inelastic exchange scattering of low-energy electrons off disordered localized Cr{sup 3+} magnetic moments at a Cr{sub 2}O{sub 3} surface is studied by spin-polarized electron-energy-loss spectroscopy. The excitations from a spin-quartet ground state to doublet states via exchange scattering give rise to sharp energy-loss lines, which are predominantly spin flip, and provide an efficient electron depolarization mechanism.

Reductive nitrosylation of tetraoxometalates. Part 15. Generation of Mn(NO)3+, Mn(NO)2+, and Mn(NO)22+moieties directly from MnO4–. Synthesis, characterization, and electrochemistry of cyanonitrosyl derivatives of manganese

In an aqueous–alkaline medium MnO4– undergoes an apparently single-step nitrosylation reaction, in the presence of an excess of NH2OH·HCl and CN–, to afford complexes containing Mn(NO)2+, Mn(NO)22+(hitherto unknown), or Mn(NO)3+ moieties. This is evident from the products K3[Mn(NO)(CN)5]·2H2O (1), [PPh4]2[Mn(NO)2(CN)4]·H2O, (2), [NMe4]2[Mn(NO)(CN)4]·2H2O (3), and isomeric [Mn(NO)(CN)3(L–L)][(4a), (1Oa), for L–L = 2,2′-bipyridine; (4b), (10b), for L–L = 1,10-phenanthroline]. The last compounds contain formally MnII in a spin-quartet ground state, as confirmed by their variable-temperature magnetic susceptibility and e.s.r. data. The reductive nitrosylation also generates Mn2(NO)24+ present in MnII3[Mn2(NO)2(CN)10](5) or [PPh4]Mn2[Mn2(NO)2(CN)9](9) and Mn2(NO)25+ in [PPh4]3[Mn2(NO)2(CN)8](6a). Complex (6a) is an one-electron paramagnet, shows an highly featured e.s.r. spectrum, and exhibits a rather irreversible cyclic voltammetric oxidative response at an apparent E0298 of 0.98 V vs. saturated calomel electrode (s.c.e.) corresponding to the process Mn2(NO)25+⇌ Mn2(NO)26+. The reaction when conducted in a near neutral medium, produces besides (10a), (1Ob), and (5), another product of possible composition R3[Mn2(NO)2(CN)8]·3H2O [R = PPh4(6b), NMe4(7) or Cs (8)] obviously containing a Mn2(NO)25+ core. The product (6b) is an isomer of (6a) and shows an e.s.r. spectrum having even more features than that of (6a). Compound (6b), however, shows a reversible cyclic reponse [E0298= 0.85 V vs. s.c.e. (0.47 V vs. ferrocene–ferrocenium] assigned to the electrode process shown for (6a).

The electronic states of Al 3

The electronic and geometrical structural properties of Al + 3, Al 3 and Al − 3 have been investigated using an ab initio complete active space, multi-configuration self-consistent field method in a double-zeta plus polarization Gaussian basis set. The ten core electrons of each Al atom were replaced by an accurate compact effective core potential. Al + 3 is predicted to be linear and Al − 3 is calculated to have near-D 3h, symmetry. The neutral trimer has a near-equilateral triangle static geometry. The electronic ground states of Al + 3 and Al − 3 are both predicted to be relatively unreactive 1A 1 closed-shell species. Al 3 is calculated to hav state, in disagreement with recent interpretations of ESR spectra in matrix isolation as favoring a spin-quartet ground state.

Electronic structure of the MoFe3S4(SH)3−6 ion: A broken-symmetry metal–sulfur cluster

A set of MS-Xα calculations on the MoFe3S4 (SH)3−6 ion is reported. Three levels of theoretical models are considered: spin-restricted, C3v symmetry, which is most easily compared with the traditional ligand-field picture; spin-polarized, C3v symmetry; and spin-polarized, Cs symmetry. An MS=3/2 ground state corresponding closely to the experimental spin-quartet ground state of a single-cube MoFe3S4 cluster is found at the level of the Cs broken-symmetry model. This state has two antiferromagnetically coupled pairs of metal ions: a net majority-spin iron pair and a net minority-spin Mo–Fe pair. The spin densities on the three iron atoms are nearly equal, with 3.06 electrons of spin density on each Fe; Mo carries only a very small net spin, 0.4 electrons. Calculated Mössbauer quadrupole splittings and isomer shifts agree well with experimental results. The model suggests that a quintet ground state should be produced on reduction, consistent with experiment. The present MoFe3S4 cluster calculations are compared extensively with corresponding results for the Fe4S4 cluster.

ChemInform Abstract: LOW‐TEMPERATURE MOESSBAUER SPECTROSCOPY STUDY OF SOME PARTIALLY SOLVATED TRIS(DIALKYLDITHIOCARBAMATO) IRON(III) COMPLEXES: THE POSSIBILITY OF STABILIZATION OF A SPIN‐QUARTET GROUND STATE

Chemischer InformationsdienstVolume 13, Issue 2 Physical Organic Chemistry ChemInform Abstract: LOW-TEMPERATURE MOESSBAUER SPECTROSCOPY STUDY OF SOME PARTIALLY SOLVATED TRIS(DIALKYLDITHIOCARBAMATO) IRON(III) COMPLEXES: THE POSSIBILITY OF STABILIZATION OF A SPIN-QUARTET GROUND STATE G. A. EISMAN, G. A. EISMANSearch for more papers by this authorW. M. REIFF, W. M. REIFFSearch for more papers by this authorR. J. BUTCHER, R. J. BUTCHERSearch for more papers by this authorE. SINN, E. SINNSearch for more papers by this author G. A. EISMAN, G. A. EISMANSearch for more papers by this authorW. M. REIFF, W. M. REIFFSearch for more papers by this authorR. J. BUTCHER, R. J. BUTCHERSearch for more papers by this authorE. SINN, E. SINNSearch for more papers by this author First published: January 12, 1982 https://doi.org/10.1002/chin.198202060Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume13, Issue2January 12, 1982 RelatedInformation

Low-temperature Moessbauer spectroscopy study of some partially solvated tris(dialkyldithiocarbamato) iron(III) complexes: the possibility of stabilization of a spin-quartet ground state

Low-temperature Moessbauer spectroscopy study of some partially solvated tris(dialkyldithiocarbamato) iron(III) complexes: the possibility of stabilization of a spin-quartet ground state