Synthesis of complexes with tungstencobalt bonds via alkylidyne group coupling reactions; crystal structure of the compound [Wco{μ-C(C6H4Me-4)C(O)C(C6H4Me-4)}(CO)5(η-C5H5)]

Reactions of 2-Butyne with Group 6-Group 10 Heterobimetallics. New Mixed-Metal Metallacycle Chemistry

“…NMR spectral data (of the 11a,b mixture, acetone-de, <5, ppm) are as follows: 11a, 5.13 (Cp), 3.36 (OMe), 1.92, 1.84, 1.442, 1.435, 1.414, 1.382, 1.306, 0.712 (Me signals); lib, 5.08 (Cp), 3.34 (OMe), 2.17, 2.12,1.79, 1.60,1.34,1.25,1.11, 0.66 (Me signals). 13C NMR spectral data (of 11a,b mixture, acetone-dg, ó, ppm) 11a, 248.9 (CO), 246.3 (CO), 141.5, 132.7, 106.1, 104.6, 102.7, 101.8, 99.8, 91.5 (Cp), 60.2, 57.0, 32.3 (Me), 23.8 (Me), 23.4 (Me), 11.6 (Me), 10.8 (Me), 10.5 (Me), 8.0 (Me), 7.7 (Me); lib, 251.9 (CO), 246.8 (CO), 150.4, 133.4, 110.6, 104.7, 103.1, 101.2, 91.5 (Cp), 57.2, 55.0, 23.3 (Me), 22.2 (Me), 11.1 (Me), 11.0 (Me), 9.4 (Me), 8.5 (Me). 0)Cp]+BF4- (7).…”

Hydrocarbyl Ligand Transformations on Heterobimetallic Complexes

“…Two cobalt-tungsten heterobimetallic complexes are obtained: µ-RCtCR′ species 128 (for all combinations of 127 and 3 attempted) and complexes 129 (formed in the reactions of 127a with 3b and 3e only), in which there are bridging CTol-CO-CTol groups as summarized in the scheme. 138…”

“…The product is the µ-PhCtCPh complex 128m, shown in Scheme 149, which is believed to form by ring opening of the organic ligand and coordination of the resulting CPh-CPh-CO group onto the dimetal center, followed by decarbonylation. 138 The bridging organic ligand that spans the iron-platinum bond in 243 shown in Scheme 150 is formed by the coupling of allene with a carbonyl ligand (see Scheme 129). When refluxed in benzene, this molecule eliminates CO and forms the allene complex 271 of unusual geometry.…”

Cyclopropenylium Cations, Cyclopropenones, and HeteroanaloguesRecent Advances

“…401 Cyclopropenones are known to give some dinuclear metal complexes and complexes with a metal- containing cluster. When treated with Pt 3 (CNBu t ) 6 402 and WCo(CO) 7 (η-C 5 H 5 ), 403 diarylcyclopropenones underwent cleavage of the CdC bond, forming homoand heterodinuclear complexes 439 and 440, respectively. The reaction of diphenylcyclopropenethione with Fe 2 (CO) 9 gave a complex having a triafulvene structure 441 and a carbene complex 442.…”