Although a ripe old discipline by now, carbene chemistry continues to flourish as both
theorists and experimentalists have shown sustained interest in this area of research. While …

Photolysis of 1-(2-adamantylidene)-1a, 9b-dihydro-1 H-cyclopropa [l] phenanthrene in
benzene (or benzene-d 6) at ambient temperature produces adamantylidenecarbene. The …

Alkylidene carbenes undergo rapid inter-and intramolecular reactions and rearrangements,
including 1, 2-migrations of β-substituents to generate alkynes. Their propensity for …

Femtosecond laser flash photolysis of 3-(1 a, 9 b-dihydro-1 H-cyclopropa [l] phenanthren-1-
ylidene) tetrahydrofuran produces singlet 3-oxacyclopentylidenecarbene which reacts with …

The photoexcitation of α-diazocarbonyl compounds produces singlet carbene intermediates
that react with nucleophilic solvent molecules to form ylides. The zwitterionic nature of these …

Three polymorphs of the hydrocarbon 9-[(9 H-fluoren-9-ylidene) methyl] phenanthrene have
been isolated and characterized by single-crystal X-ray crystallography. Of these, one form …

Ab initio computations of cyclobutylcarbene (c-C4H7CH) were performed using the UMP4
(fc)/6-311++ G (2df, 2p)//UMP2 (full)/6-311++ G (d, p) theoretical model. The carbene's most …

Singlet vinylidenes (R2C═ C:) are proposed as intermediates in a series of organic
reactions, and very few have been studied by matrix isolation or gas-phase spectroscopy …

The strained caged alkyne bicyclo [2.2. 2] oct-2-yne, previously reported to be inaccessible,
was generated via the Fritsch–Buttenberg–Wiechell rearrangement of 7-norbornylidene …

Strained cycloalkynes are of considerable interest to theoreticians and experimentalists, and
possess much synthetic value as well. Herein, a series of cyclic alkylidenecarbenes …