Synthesis of heteropolynuclear complexes with 1,1,1-tris(diphenylphosphinomethyl)ethane. Crystal structure of [(OC)<sub>4</sub>Mo{(Ph<sub>2</sub>PCH<sub>2</sub>)<sub>2</sub>CMe(CH<sub>2</sub>PPh<sub>2</sub>)}AuCl]
作者:Eduardo J. Fernández、M. Concepciön Gimeno、Peter G. Jones、Antonio Laguna、Mariano Laguna、Elena Olmos
DOI:10.1039/dt9960003603
日期:——
Treatment of [M(CO)(4)(Ph(2)PCH(2))(2)CMe(CH(2)PPh(2))}] (M = Mo or W) with neutral or cationic gold-(I) or -(III) derivatives afforded bi- or tri-nuclear complexes containing the triphosphine (Ph(2)PCH(2))(3)CMe (tdppme) acting as a mu-P,P',P '' ligand, a co-ordination mode poorly represented thus far. The binuclear derivative [(OC)(4)Mo(tdppme)AuCl] further reacts with 1 equivalent of Tl(acac) (acac = acetylacetonate) to afford [(OC)(4)Mo(tdppme)Au(acac)]. This complex acts as a deprotonating agent in reactions with various starting materials containing phosphines such as (Ph(2)P)(2)CH2 or (Ph(2)P)(3)CH, leading to the formation of trinuclear methanide complexes. The crystal structure of [(OC)(4)Mo(tdppme)AuCl] has been established by X-ray crystallography.
Complexes of the tripod ligand, tris(diphenylphosphino)methane
作者:Joel T. Mague、Steven E. Dessens
DOI:10.1016/s0022-328x(00)99162-9
日期:1984.2
Synthesis of heterometallic species with (Ph<sub>2</sub>P)<sub>3</sub>CH or (Ph<sub>2</sub>P)<sub>3</sub>C<sup>–</sup>. Crystal structures of [Mo(CO)<sub>4</sub>{(PPh<sub>2</sub>)<sub>2</sub>CHPPh<sub>2</sub>AuCl}], [Mo(CO)<sub>4</sub>{(PPh<sub>2</sub>)<sub>2</sub>CHPPh<sub>2</sub>Au(C<sub>6</sub>F<sub>5</sub>)}] and [NBu]<sub>4</sub>[Mo(CO)<sub>4</sub>{(PPh<sub>2</sub>)<sub>2</sub>CPPh<sub>2</sub>Au(C<sub>6</sub>F<sub>5</sub>)}]
作者:Eduardo J. Fernández、M. Concepción Gimeno、Peter G. Jones、Antonio Laguna、Mariano Laguna、Elena Olmos
DOI:10.1039/dt9940002891
日期:——
Treatment of [M(CO)4(PPh2)2CHPPh2}] (M = Cr a, Mo b or W c) with 1 equivalent of [AuX(tht)] or [Au(tht)(PPh3)]ClO4 (tht = tetrahydrothiophene) afforded the neutral binuclear complexes [M(CO)4(PPh2)2CHPPhAuX}] (X = Cl la-lc or C6F5 2a-2c), or the cationic derivatives [M(CO)4(PPh2)2CHPPh2Au(PPh3)}]ClO4 3a-3c. Complexes 2 and 3 are readily deprotonated by [NBu4] (acac] (acac = acetylacetonate) to give the tris(diphenylphosphino)methanide species [MBu4]-[M(CO)4(PPh2)2CPPh2Au(C6F5)}] 4a-4c and [M(CO)4(PPh2)2CPPh2Au(PPh3)}] (5a-5c). Trinuclear compounds of the type [NBu4][M(CO)4[(PPh2)2CPPh2]}2Au] 6a-6c were obtained by reaction of [M(CO)4(PPh2)2CHPPh2}] with [NBu4][Au(acac)2] in the ratio 2:1. Single-crystal structure determinations were performed for compounds lb, 2b and 4b. In the neutral complexes lb and 2b the atoms C(2) (carbonyl), Mo, P(1) (co-ordinated to Au) and Au are essentially coplanar; the principal structural differences between the neutral and anionic (4b) complexes are the shorter P-C bonds and a rotation about the C-P(l) bond in the latter complex.