Application of the pople-santry-segal CNDO method to the cyclopropylcarbinyl and cyclobutyl cation and to bicyclobutane

The Conservation of Orbital Symmetry

The chemistry of heterocyclic carbenes has experienced a rapid development over the last years. In addition to the imidazolin-2-ylidenes, a large number of cyclic diaminocarbenes with different ring sizes have been described. Aside from diaminocarbenes, P-heterocyclic carbenes, and derivatives with only one, or even no heteroatom within the carbene ring are known. New methods for the synthesis of complexes with N-heterocyclic carbene ligands such as the oxidative addition or the metal atom template controlled cyclization of β-functionalized isocyanides have been developed recently. This review summarizes the new developments regarding the synthesis of N-heterocyclic carbenes and their metal complexes.

Heterocyclic Carbenes: Synthesis and Coordination Chemistry

Die Erhaltung der Orbitalsymmetrie

George W. Van Dine

Papers

The electronic structure of methylenes

Substituent Effects on Cyclopropylcarbinyl Solvolysis Rates. Evidence for Symmetrical Transition States

Steric and Electrocyclic Control of Cyclopropyl Tosylate Solvolysis Rates

Isocyanide-cyanide and isoelectronic rearrangements