Matrix Spectroscopy of 2‐Adamantylidene, a Dialkylcarbene with Singlet Ground State

Abstract

A broad band at λmax ≈ 620 mm confirms the singlet character of the carbene 1, since no other conceivable compounds in the system should absorb in this region. Moreover, calculations on dialkylcarbenes yield similar λ values. Compound 1 rearranges photochemically to 2, and on warming in a CO-doped argon matrix it affords 3.