40691-28-9Relevant articles and documents
Transition metal complexes containing P(C6H5)(C6H4Cl-2)2. The effect of added Lewis bases as a probe for substitution reactions occurring in ambient temperature Suzuki couplings catalyzed by Pd/P(C6H5)(C6H4Cl-2)2
Stone, Joshua J.,Stockland Jr., Robert A.,Rath, Nigam P.
, p. 236 - 240 (2008/10/08)
The reactivity of the d8 transition metal complexes, [NiBr2(CH3OCH2CH2OCH 3)] and MCl2L2 (M=Pd, Pt; L=CH3CN; L2=1,5-cyclooctadiene), towards P(C6H5)(C6H4Cl-2)2 (1) was investigated. While treatment of [PdCl2(cod)] with 2 equiv of 1 resulted in displacement of the weakly coordinating cyclooctadiene and formation of [PdCl2(P(C6H5)(C6H 4Cl-2)2)2], analogous reactions with [PtCl2(cod)] afforded the monosubstituted species [PtCl2(cod)(P(C6H5)(C6H 4Cl-2)2)]. The disubstituted complex [PtCl2(P(C6H5)(C6H 4Cl-2)2)2] was successfully obtained by treatment of [PtCl2(NCCH3)2] with 2 equiv of 1. However, attempts to react 1 with [NiBr2(CH3OCH2CH2OCH 3)] were unsuccessful. The chlorinated triphenyl phosphine is quite labile and is readily displaced from [PdCl2(P(C6H5)(C6H 4Cl-2)2)2] by various Lewis bases including nitrogen containing ligands such as 2,2′-bipyridine. The molecular structure of trans-[PdCl2(P(C6H5)(C6H 4Cl-2)2)2] was determined by X-ray diffraction and represents the first molecular structure determination of a transition metal complex containing 1. This complex crystallizes in the monoclinic space group P21/n with a=10.3928(3) ?, b=16.0102(4) ?, c=13.1884(4) ?, β=90.714(2)°, and Z=4. Key geometric parameters include Pd-Cl(1)=2.309(1) ?, Pd-P(1)=2.334(1) ?; Pd-P(1)-C(7)=118.3(2)°, Pd-P(1)-C(1)=115.3(2)°, C(1)-C(6)-Cl(2)=120.7(4)° and Cl(1)-Pd-P(1)=85.86(4)°.
