Carmen L. Vélez

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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(More)
The reaction of (η-C5H5)Co(PPh3)2 (1) with 1,3-bis(isopropyl)imidazol-2-ylidene (Im Pr2, 17) leads to the formation of (η-C5H5)Co(PPh3)(Im Pr2) (5) in 69% yield. N-Heterocyclic carbene 17 also undergoes reaction with (η-C5H5)Co(CO)2 (9) to give (η -C5H5)Co(Im Pr2)(CO) (6) in 30% yield. The barrier to rotation about the Co-C bond in 6 has been determined by(More)
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