Main Group Element Chemistry Research Articles

Cp* Chemistry of main-group elements †

In the chemistry of main-group elements the pentamethylcyclopentadienyl (Cp*) group represents a very important substituent. Owing to its quite variable bonding modes, ranging from mainly ionic to mainly covalent and from η5via η2/3 to η1, an effective adjustment to the electronic situation at the respective element centre is feasible. Furthermore, the steric requirements of the σ- or π-bound Cp* group enable the kinetic stabilization of otherwise highly reactive species. Covalent Cp*–element bonds are comparatively weak, consequently allowing fast sigmatropic and haptotropic rearrangement processes. A further consequence is that the Cp* radical as well as the Cp*− anion are potential leaving groups. This phenomenon forms the basis of a rich faceted substitution and elimination chemistry. As proof of this statement, several examples from phosphorus, silicon, and gallium chemistry are presented.

The First Nitride Spinels—New Synthetic Approaches to Binary Group 14 Nitrides

A significant breakthrough in the nitride chemistry of main group elements has been achieved: Surprisingly Sn(3)N(4), for which there had been no proof of existence until now, as well as the isotypic high-pressure polymorphs gamma-Si(3)N(4) and gamma-Ge(3)N(4) have been synthesized. All three compounds crystallize in a spinel structure type (see picture) that previously has not been found for nitrides, and may have a high relevance for practical applications in the context of ultrahard materials.

Structural chemistry of bismuth compounds. I. Organobismuth derivatives.

Bismuth chemistry has received much less attention in comparison with that of N, P, As, and Sb, but the last years have revealed an increasing interest in the investigation of both the inorganic and the organometallic chemistry of the heaviest element of the group 15 elements.1 There are several fields Cristian Silvestru (left) was born in Baia-Mare, Romania, in 1955 and graduated in chemistry at the Babes-Bolyai University, Cluj-Napoca, in 1979. He obtained his M.Sc. degree 1 year later. After 2 years as Chemist in a mining company, he was a Research Chemist at the Institute of Chemical and Biochemical Energetics from 1982 to 1989. He received his Ph.D. degree in the group of Professor Ionel Haiduc in Cluj in 1990, with his dissertation research on organometallic compounds with potential biologic activity. In 1990, he joined the Chemistry Department of the BabesBolyai University in Cluj-Napoca. Since 1995 he has been a Full Professor of Inorganic Chemistry and since 1996 Vice-Dean of the Faculty of Chemistry and Engineering Chemistry. He published a book, Organometallics in Cancer Chemotherapy (with I. Haiduc, 2 volumes, CRC Press: Boca Raton, FL, 1989, 1990), and in 1992 received the “Petre Spacu” award of the Romanian Academy for his contributions on the antitumor properties of organometallic compounds (with Dr. Carmen Socaciu and Dr. Adela Bara). Professor Silvestru spent several research stays in Germany (Bremen University 1993sVisiting Professor, 1996sDAAD Grant), Belgium (Vrije Universiteit Brussel 1993sEuropean Community Grant), and Mexico (Instituto de Quimica, Universidad Nacional Autonoma de Mexico 1993−95sVisiting Research Professor, CONACYT Grant). His research interests include organometallic chemistry of main group elements, coordination chemistry of thioligands (mainly organophosphorus compounds), and biological (antitumor) properties of main group organometallics.

ChemInform Abstract: Zirconocene [Cp2Zr] Synthon and Benzynezirconocene Complexes as Tools in Main Group Element Chemistry

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Zirconocene [Cp 2Zr] synthon and benzynezirconocene complexes as tools in main group element chemistry

Interactions between zirconocene or benzyne zirconocene and unsaturated species incorporating main group elements lead to a variety of new metallaheterocycles. Efficient new methodologies of regiospecific syntheses of mono-, bi-, or tricyclic systems incorporating phosphorus, nitrogen, selenium, antimony, germanium or tin are reported.

Bi2 (O2 CCF3 )4 ]⋅C6 Me6 -Arene Adduct of a Reduced Main Group Element Carboxylate with Paddle Wheel Structure.

The first main group dimetal complex with tetragonal-prismatic coordination is [Bi2 (O2 CCF3 )4 ] (structure depicted), which forms a component of a linear one-dimensional coordination copolymer with hexamethylbenzene molecules. The "paddle wheel" motif well-known from chromium(II) acetate and hundreds of other transition metal complexes is thus introduced into the coordination chemistry of main group elements.

Bi2(O2CCF3)4]⋅C6Me6—Arene Adduct of a Reduced Main Group Element Carboxylate with Paddle Wheel Structure

The first main group dimetal complex with tetragonal-prismatic coordination is [Bi2(O2CCF3)4] (structure depicted), which forms a component of a linear one-dimensional coordination copolymer with hexamethylbenzene molecules. The “paddle wheel” motif well-known from chromium(II) acetate and hundreds of other transition metal complexes is thus introduced into the coordination chemistry of main group elements.

Inorganic Chemistry of Main Group Elements (King, R. Bruce)

ADVERTISEMENT RETURN TO ISSUEPREVBook and Media Revie...Book and Media ReviewInorganic Chemistry of Main Group Elements (King, R. Bruce)Cite this: J. Chem. Educ. 1995, 72, 6, A126Publication Date (Print):June 1, 1995Publication History Received3 August 2009Published online1 June 1995Published inissue 1 June 1995https://doi.org/10.1021/ed072pA126.5RIGHTS & PERMISSIONSArticle Views790Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (802 KB) Get e-Alerts Get e-Alerts

Inorganic chemistry of main group elements

Inorganic chemistry of main group elements

Organometallic Chemistry of Main Group Elements in the Gas Phase: Formation and Reactions of Gaseous [AsI2.cntdot.arene]+ Complexes

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganometallic Chemistry of Main Group Elements in the Gas Phase: Formation and Reactions of Gaseous [AsI2.cntdot.arene]+ ComplexesHeinrich L. Sievers, Hans-Fr. Gruetzmacher, Hansjoerg Gruetzmacher, and Stefan PitterCite this: J. Am. Chem. Soc. 1995, 117, 8, 2313–2320Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Published inissue 1 March 1995https://doi.org/10.1021/ja00113a020RIGHTS & PERMISSIONSArticle Views98Altmetric-Citations12LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (921 KB) Get e-Alerts Get e-Alerts

Ether- and amine-substituted cyclopentadienes as ligands in organometallic compounds: examples for iron and barium

Cyclopentadienes with Lewis donor atoms in side chains of the type C 5H 5CH 2CH 2R (R  OCH 3, OC 2H 5, CH 2OC 2H 5, N(CH 3) 2, OCH 2CH 2OCH 3) are described. After deprotonation, these compounds can be used as ligands in main group and transition element chemistry, as shown by the examples of bariocenes and ferrocenes. 13C-NMR evidence for the Lewis base stabilization of Ba(C 5H 4CH 2CH 2OCH 2CH 2OCH 3) 2 is presented. The compounds [parent cyclopentadiene for R  OCH 2CH 2OCH 3; Ba(C 5H 4CH 2CH 2OCH 2CH 2OCH 3) 2; Fe(C 5H 4 CH 2CH 2R) 2 for all R] are characterized by 1H- and 13C{ 1H}-NMR, IR, MS and elemental analysis.

The IOF6- anion: the first example of a pentagonal bipyramidal AX5YZ species

Abstract : In main group element chemistry, coordination numbers in excess of six are relatively rare, but they are of considerable interest due to special features caused by steric crowding of the ligands, free valence electron pairs being sterically either active or inactive, and the propensity of the molecules to exhibit fluxionality. Of particular interest are heptacoordinated species which could exist either as a monocapped octahedron, a monocapped trigonal prism, or a pentagonal bipyramid. According to the VSEPR model of 'repelling points on a sphere', the preferred structures should be the monocapped octahedron or trigonal prism

Tin(II) poly(1-pyrazolyl)borates

Abstract : Ever since their first preparation poly(1-pyrazolyl)borates, M((pz)( 4-n)BR(n)) (M = alkali metal, Hpz = pyrazole or C-substituted derivative thereof, R = non-coordinating substituent, n= 0,1,2), have found extensive use as chelating ligands in transition metal chemistry. However, studies of the poly(1-pyrazolyl)borate chemistry of main group elements have been rather limited. Only most recently have some characterized poly(1-pyrazolyl)borates of main group (other than alkali and alkaline earth) metals become available. The data include four (somewhat contradictory) reports on tin(IV)3-6 and one on tin(II) derivatives; silicon or germanium poly(1-pyrazolyl)borates have not yet been reported. In an extension of recent studies on the interaction of boron compounds with poly(1-pyrazolyl)borates, the synthesis and characterization of other main group element derivatives of the latter is currently being investigated. The present report describes a study of a series of Sn(II) poly(1- pyrazolyl)borates.

The resurgence of main-group element chemistry

After a brief historical introduction outlining the way that chemistry as a whole has developed during the past few decades, the recent resurgence of interest in the main-group elements is highlighted. These elements in the s and p blocks of the Periodic Table now constitute one of the major areas of contemporary chemical research. Reasons for this pattern of development are considered and then various illustrative examples are selected from the chemistry of each Group to give some idea of the enormous scope and variety of the chemistry of these elements.