Radialene Research Articles

Synthesis and Properties of Fused Triad Donors Composed of Two 1,3-Dithiole[5]radialenes and Extended Tetrathiafulvalene

Synthesis and Properties of Fused Triad Donors Composed of Two 1,3-Dithiole[5]radialenes and Extended Tetrathiafulvalene

Cover Feature: Hydration of Polycationic [5]Radialene with Quintuple 1,3‐Dithiol‐2‐ylidenes Leads to a New Class of π‐Extended Tetrathiafulvalene Scaffold (Chem. Eur. J. 19/2019)

Cover Feature: Hydration of Polycationic [5]Radialene with Quintuple 1,3‐Dithiol‐2‐ylidenes Leads to a New Class of π‐Extended Tetrathiafulvalene Scaffold (Chem. Eur. J. 19/2019)

Unexpected Mechanism for Formal [2 + 2] Cycloadditions of Metallacyclocumulenes

The formation of radialene complex 6M proceeds through a three-membered metallacyclopropene com-plex 7M, contrary to the prevailing notion of simple dimerization of metallacyclocumulene 1M. The 1M-7M equilibrium, which is predominantly governed by the size-dependent ligand binding of the metal atoms, plays a decisive role in the chemistry of Cp 2 M-ligand complexes. This size dependency is further fine-tuned by the substituents on the substrates and helps in exploiting these classes of metallacycles to generate new chemistry.

Synthesis and Properties of 4,5,6‐Triphospha[3]radialene

Synthesis and Properties of 4,5,6‐Triphospha[3]radialene

ChemInform Abstract: Preparation and Properties, Reactions, and Applications of Radialenes

ChemInform Abstract: Preparation and Properties, Reactions, and Applications of Radialenes

ChemInform Abstract: Expanded Radialenes: A Novel Class of Cross-Conjugated Macrocycles.

ChemInform Abstract: Expanded Radialenes: A Novel Class of Cross-Conjugated Macrocycles.

Energy spectra and magnetic properties of radialenes, dendralenes and their poly-radical ions. A new class of polaronic high-spin π-systems

Abstract The energy spectra of infinite radialenes (RA) and dendralenes (DE) — the simplest one-dimensional π-systems possessing non-degenerate ground states — are theoretically investigated. Three factors, a topological, a geometrical, and a correlational, contribute to the energy gap of 3.6 eV. The charge density distribution of the Jahn-Teller active mono-cation of the [3]RA and the charged [6]RA, and the charged [6]DE is studied. The polymers derived from the poly-radical ions of infinite RAs possess a narrow half-filled band (HFB) within the energy gap. The different contributions to the effective spin exchange interaction between the unpaired electrons in the HFB: the potential exchange, the kinetic exchange, and the indirect exchange (due to the spin polarization) were calculated. In all cases the effective spin exchange is positive, i.e. the ground state of the polymers is a high-spin one. The ferromagnetic interaction within the HFB is due to the predominant role of the direct Coulomb exchange. A juxtaposition between the structural principle of the polaronic high-spin systems considered here and Fukutome's polaronic high-spin systems is discussed.

Expanded Radialenes: A Novel Class of Cross‐Conjugated Macrocycles

Expanded Radialenes: A Novel Class of Cross‐Conjugated Macrocycles

Synthesis and Structure of a Diphospha[4]radialene

Synthesis and Structure of a Diphospha[4]radialene

A bis(alkylidene)silirane (sila[3]radialene) by the reaction of dimesitylsilylene with tetramethylbutatriene

A bis(alkylidene)silirane (sila[3]radialene) by the reaction of dimesitylsilylene with tetramethylbutatriene

Nickel-catalyzed cyclodimerization of [5]cumulene (hexapentaene). Synthesis of a novel [4]radialene system

Nickel-catalyzed cyclodimerization of [5]cumulene (hexapentaene). Synthesis of a novel [4]radialene system