Formation of novel tetradentate phosphine ligand o-C6H4(PPhCH2CH2PPh2)(2) by coupling of two diphosphine ligands bound to low-valent Mo or W center. Synthesis and structure of [M{o-C6H4(PPhCH2CH2PPh2)(2)}(Ph2PCH2CH2PPh2)] (M= Mo, W)
C. Arita et al., Formation of novel tetradentate phosphine ligand o-C6H4(PPhCH2CH2PPh2)(2) by coupling of two diphosphine ligands bound to low-valent Mo or W center. Synthesis and structure of [M{o-C6H4(PPhCH2CH2PPh2)(2)}(Ph2PCH2CH2PPh2)] (M= Mo, W), CHEM LETT, (7), 1999, pp. 611-612
A mixture of trans-[M(N-2)(2)(dppe)(2)] (M = Mo or W; dppe = Ph2PCH2CH2PPh2
) and dppe was heated to reflux in benzene or toluene to give the M(0) comp
lex [M(P-4)(dppe)], which contains the novel tetradentate phosphine o-C6H4
(PPhCH2CH2PPh2)(2) (P-4) arising from the coupling of two dppe ligands. The
reaction of [Mo(P-4)(dppe)] with CO afforded the carbonyl complex [Mo(CO)(
2)(P-4)].