M. Tamm, A. Grzegorzewski, T. Steiner
Nov 12, 1996
Citations
0
Influential Citations
27
Citations
Journal
Organometallics
Abstract
Template syntheses of sesquifulvalenes (2,4,6-cycloheptatrien-1-ylidene)cyclopentadiene (1) and [(2,4,6-cycloheptatrien-1-ylidene)ethenylidene]cyclopentadiene (2) lead to air-stable complexes [(1)Mn(CO)2L]BF4 (4) and [(2)Mn(CO)2L]BF4 (8) (a, L = CO; b, L = P(OMe)3; c, L = PPh3). The different σ-donor/π-acceptor abilities of the ligands L allow a tuning of the electronic and optical properties of complexes 4 and 8, which are particularly studied by UV/vis spectroscopy. The first molecular hyperpolarizabilities β of complexes 4 and 8 have been determined in dichloromethane and acetonitrile solutions by hyper Raleigh scattering. The X-ray crystal structures of 4b, 8b, and of the alkenylcyclopentadienyl complex [4,5η-(2,4,6-cycloheptatrien-1-yl)-η5-cyclopentadienyl]dicarbonylmanganese(I) (5) are reported.