108917-01-7Relevant academic research and scientific papers
OCTAHEDRAL METAL CARBONYLS XL. RATES OF OLEFIN COORDINATION VIA CHELATE RING-CLOSURE IN cis-1-4-PENTENYLDIPHENYLPHOSPHINE)TETRACARBONYLTUNGSTEN(0)> CREATED THROUGH FLASH PHOTOLYSIS
Wermer, Paul H.,Dobson, Charles B.,Dobson, Gerard R.
, p. C47 - C50 (1986)
Ring-closure via olefin coordination in coordinatively-unsaturated cis-1-pdpp)W(CO)4>, (pdpp=CH2=CH(CH2)3P(C6H5)2, 4-pentenyldiphenylphosphine) produced via pulsed laser flash photolysis of cis-(pip)(η1-pdpp)W(CO)4 (pip=piperidine
Octahedral metal carbonyls. 77. Kinetics of chelate ring closure via olefin-tungsten bond formation in chlorobenzene solvates of tungsten carbonyl intermediates
Zhang, Shulin,Wang, I.-Hsiung,Wermer, Paul H.,Dobson, Charles B.,Dobson, Gerard R.
, p. 3482 - 3488 (2008/10/08)
The kinetics and mechanism of chelate ring closure in a series of cis-(CB)(η1-P-ol) W(CO)4 transients produced via pulsed laser flash photolysis from cis-(pip)(η1-P-ol)W(CO)4 complexes in CB solution (CB = chlorobenzene; pip = piperidine; P-ol = Ph2P(CH2)nCH=CH2, n = 1-4) have been investigated. In the presence of pip, competitive solvent displacement reactions via chelate ring closure and pip attack at the transients are observed. Studies of chelate ring closure in CB-hep solvent mixtures (hep = n-heptane) and of solvent displacement from photogenerated cis-(CB)(Ph2MeP)W(CO)4 by pip and 1-hexene were also carried out. These investigations indicate that for reactions of cis-(CB)(Ph2MeP)W(CO)4 with 1-hexene a single CB-displacement reaction pathway is accessible but that chelate ring closure in cis-(CB)(η1-ol-P)W(CO)4 complexes takes place via two competitive CB displacement pathways. The rate data and activation parameters indicate that all these pathways involve the intermediacy of species in which Ph2MeP or P-ol hydrogens (ring or chain) are agostically bonded to the metal.
