Pincer “Hemilabile” Effect. PCN Platinum(II) Complexes with Different Amine “Arm Length”
作者： Elena Poverenov , Mark Gandelman , Linda J. W. Shimon , Haim Rozenberg , Yehoshoa Ben-David
DOI: 10.1021/OM049182M
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摘要: The reactivity of the “long arm” PCN-type pincer ligand C6H4[CH2P(tBu)2](CH2)2N(CH3)2 (1), which forms complexes bearing a six-membered amine chelate and five-membered phosphine chelate, was compared with that new “normal” PCN C6H4[CH2P(tBu)2](CH2)N(CH2CH3)2 (2), leads to formation two chelates. chloride (PCN)PtCl (3, 4) unsaturated cationic [(PCN)Pt]+X- (X = BF4, OTf) (5, 6, 7), based on both ligands, were prepared reacted different reagents give aqua, [(PCN-1)Pt(H2O)]+BF4- (10); hydroxo, (PCN-1)Pt(OH) (11); carbonyl [(PCN)Pt(CO)]+BF4- (8, 9); hydride, (PCN-1)PtH (16) complexes. structures 4, 8, 10, 11, 12 determined by X-ray crystallography. When treated hydrogen gas, PCN-1-based complex 8 led trimeric cluster, [C6H6[CH2P(tBu)2](CH2)2N(CH3)2Pt(CO)]3 (12), while PCN-based 9 remained...
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