当将邻金属化的配合物顺式[Pt(kappa(2)-C6H3-5-R-2-PPh2)2](R = H 1,Me 2)在甲苯中加热或在室温下用CO处理时,四元螯合环之一不可逆地打开,得到双核异构体[Pt2(kappa(2)-C6H3-5-R-2-PPh2)2(mu-C6H3-5-R-2-PPh2)2]( R = H 10,Me 11)。单晶X射线衍射研究显示10中的Pt ... Pt分离为3.3875(4)A。1和2与CO反应的副产物是聚合异构体(R = H 13,Me 14 ),其中一种PC配体被认为在分子间桥接相邻的铂原子。与1和2的行为相反,当在甲苯中加热cis- [Pt(kappa(2)-C6H3-6-Me-2-PPh2)2](cis-3)时,主要产物是反式3 ,顺式3与CO反应生成羰基配合物[Pt(CO)(kappa(1)-C-C6H3-6-Me-2-PPh2)(2-C6H3-6-Me-2-PPh2)]
Synthesis, Structure, and Reactions of a Binuclear Gold(I)−Gold(III) Complex Containing Bridging and Bidentate (2-Diphenylphosphino-6-methyl)phenyl Groups
作者:Suresh K. Bhargava、Fabian Mohr、Martin A. Bennett、Lee L. Welling、Anthony C. Willis
DOI:10.1021/om000672y
日期:2000.12.1
crystallography. Complex 8a contains linearly coordinated gold(I) and planar coordinated gold(III) atoms separated by 3.4692(7) Å; one arylphosphine group bridges the metal atoms, the other acts as a bidentate chelate ligand to gold(III). Complexes 6a−8a can be oxidized further by halogens to give either gold(I) complexes of (2-halo-3-methylphenyl)diphenylphosphine, [AuXPh2P(C6H3-2-X-3-Me)] [X = Br (10a), I (11a)]
有机锂试剂(C 6 H 3 -2-PPh 2 -6-Me)Li或(C 6 H 3 -2-PPh 2 -5-Me)Li与[AuBr(PEt 3)]反应生成相应的环金属化的digold(I)配合物[Au 2(μ- C6 H 3 -2-PPh 2 - n -Me)2 ](n = 6,1a ; n = 5,1b),金属-金属距离为1a,2.861 (2)Å,与未取代的化合物[Au 2(μ-2- C6 H4 PPh 2)2 ]。两种络合物都通过氧化添加卤素,从而形成金属-金属键合的digold(II)络合物[Au 2 X 2(μ- C6 H 3 -2-PPh 2 - n -Me)2 ] [ n = 6,X = Cl(2a),Br(3a),I(4a);n = 5,X = Cl(2b),Br(3b),I(4b)],并且1b还添加过氧化二苯甲酰,得到bis(benzoato)digold(II)络合物[Au
ortho-Metallated complexes of platinum(<scp>ii</scp>) and diplatinum(<scp>i</scp>) containing the carbanions (2-diphenylphosphino)phenyl and (2-diphenylphosphino)-n-tolyl (n = 5, 6)
作者:Martin A. Bennett、Suresh K. Bhargava、Johannes Messelhäuser、Steven H. Privér、Lee L. Welling、Anthony C. Willis
DOI:10.1039/b702808c
日期:——
protonated by HBF4 to form a mu-hydridodiplatinum(II) salt [Pt2(mu-H)(mu-2-C6H4PPh2)2(CNBut)2]BF4 [21]BF4. The J(PtPt) values in [21]BF4 and 18, 2700 Hz and 4421 Hz, respectively, reflect the weakening of the Pt-Pt interaction caused by protonation. Similarly, 16 and 17 react with the electrophiles iodine and strong acids to give salts of general formula [Pt2(mu-Z)(mu-C6H3-5-R-2-PPh2)2(PPh3)2]Y (Y = Z =
当将邻金属化的配合物顺式[Pt(kappa(2)-C6H3-5-R-2-PPh2)2](R = H 1,Me 2)在甲苯中加热或在室温下用CO处理时,四元螯合环之一不可逆地打开,得到双核异构体[Pt2(kappa(2)-C6H3-5-R-2-PPh2)2(mu-C6H3-5-R-2-PPh2)2]( R = H 10,Me 11)。单晶X射线衍射研究显示10中的Pt ... Pt分离为3.3875(4)A。1和2与CO反应的副产物是聚合异构体(R = H 13,Me 14 ),其中一种PC配体被认为在分子间桥接相邻的铂原子。与1和2的行为相反,当在甲苯中加热cis- [Pt(kappa(2)-C6H3-6-Me-2-PPh2)2](cis-3)时,主要产物是反式3 ,顺式3与CO反应生成羰基配合物[Pt(CO)(kappa(1)-C-C6H3-6-Me-2-PPh2)(2-C6H3-6-Me-2-PPh2)]