Synthesis and reactivity of the novel hydride derivative RhHCl(TIMP3) (HTIMP3 = tris[1-(diphenylphosphino)-3-methyl-1H-indol-2-yl]methane)
作者:Marco Ciclosi、Francisco Estevan、Pascual Lahuerta、Vincenzo Passarelli、Julia Pérez-Prieto、Mercedes Sanaú
DOI:10.1039/b816185b
日期:——
The reaction of HTIMP3 (HTIMP3 = tris[1-(diphenylphosphino)-3-methyl-1H-indol-2-yl]methane) with [RhCl(COD)]2 and Rh(acac)(CO)2 produces RhHCl(TIMP3) (1H) and Rh(TIMP3)(CO) (2), respectively, both exhibiting tetradentate κC,κ3P-coordination of the TIMP3 moiety. The reaction of RhHCl(TIMP3) with nucleophiles (L) in the presence of AgBF4 or AgPF6 produces different compounds depending on the nature of L. Indeed, cationic Lewis adducts of formula [RhH(L)(TIMP3)]+ (2H+-5H+) are obtained when L is CO, CNCH2Ph, pyridine or CH2CHCN. On the other hand, when the incoming nucleophile is CH3COOH the hydride-free complex [Rh(CH3COO)(TIMP3)]+ (6+) is obtained. Finally, the reaction of RhHCl(TIMP3) with PhCCPh and CH2CHCOOMe in the presence of AgPF6 leads to the insertion products [Rh(PhCCHPh)(TIMP3)]+ (7+) and [Rh(CH2CH2COOMe)(TIMP3)]+ (8+), respectively. The solid state structure has been determined by single crystal X-ray diffraction in selected cases (1H, 6+).
HTIMP3(HTIMP3 = 三[1-(二苯基膦)-3-甲基-1H-吲哚-2-基]甲烷)与[RhCl(COD)]2 和 Rh(acac)(CO)2 反应分别生成 RhHCl(TIMP3) (1H) 和 Rh(TIMP3)(CO) (2),两者都显示出 TIMP3 分子的四价κC,κ3P 配位。事实上,当 L 为 CO、CNCH2Ph、吡啶或 CH2CHCN 时,会产生式为 [RhH(L)(TIMP3)]+ (2H+-5H+) 的阳离子路易斯加合物。另一方面,当进入的亲核体是 CH3COOH 时,会得到无氢化物复合物 [Rh(CH3COO)(TIMP3)]+ (6+)。最后,在 AgPF6 存在下,RhHCl(TIMP3)与 PhCCPh 和 CH2CHCOOMe 反应,分别得到插入产物 [Rh(PhCCHPh)(TIMP3)]+ (7+) 和 [Rh(CH2CH2COOMe)(TIMP3)]+ (8+)。固态结构已通过单晶 X 射线衍射确定。