title: Chemistry at the alkyne-carbene intersection: a metallacyclobutene-η3-vinylcarbene equilibration.
abstract: Synthesis of a sterically congested metallacyclobutene complex has led to the first observation of metallacyclobutene-η(3)-vinylcarbene equilibration. The structure of the η(3)-vinylcarbene complex was elucidated by spectroscopy, HRMS, and ab initio computations. The vinylcarbene complex was trapped by reactions with ethyl diazoacetate and (C5H5)Co(PPh3)2 to give cobalt-diene and dicobalt complexes, respectively.
authors.affiliation: Department of Chemistry, University of California, San Diego, La Jolla, California 92093, USA. jmoconnor@ucsd.edu
authors.forename: Joseph M
authors.initials: JM
authors.lastname: O'Connor
authors.forename: Kim K
authors.initials: KK
authors.lastname: Baldridge
authors.forename: Carmen L
authors.initials: CL
authors.lastname: Vélez
authors.forename: Arnold L
authors.initials: AL
authors.lastname: Rheingold
authors.forename: Curtis E
authors.initials: CE
authors.lastname: Moore