Organoamidometallics—VI. A new synthetic route to [N,N′-bis(polyfluorophenyl)ethane-1,2-diaminato(2-)]dipyridineplatinum(II) complexes and the preparation of [N-phenyl-N′-(polyfluorophenyl)ethane-1,2-diaminato(2-)] dipyridineplatinum(II) complexes
作者:Glen B. Deacon、Bryan M. Gatehouse、Scott T. Haubrich、Joanne Ireland、Eric T. Lawrenz
DOI:10.1016/s0277-5387(97)00310-0
日期:1998.3
Reaction of [Pt(en)Cl-2] (en = ethane-1,2-diamine) with thallium(I) carbonate (or in some cases K2CO3) and a polyfluorobenzene in hot pyridine (py) or 3-methylpyridine (tmpy) yields the [N,N'-bis (polyfluorophenyl)ethane-1,2-diaminato(2-)]platinum(II) complexes, [PtN(R)CH2}(2)L-2] (L = py, R = p-HC6F4. C6F5, p-BrC6F4, p-IC6F4, p-MeC6F4, p-C6F5C6F4, 2,3,5-F3C6H2, p-O(H)CC6F4, p-MeOC6F4; L = tmpy, R = p-HC6F4). Yields were markedly greater with the use of Tl2CO3 than reported for reactions of [Pt(en)Cl-2] with thallium(I) polyfluorobenzoates. A new class of platinum(II) amides, namely [N-(phenyl)-N'-(polyfluorophenyl)ethane-1,2-diaminato (2-)]platinum(II) complexes, [PtN(Ph)CH2CH2N(R)}L-2] (L = py, R = p-HC6F4, C6F5, p-MeC6F4, B-ClC6F4, p-BrC6F4; L = 4-methylpyridine, R = p-HC6F4): has been prepared by reaction of [Pt(PhNHCH2CH2NH2)I-2] with Tl2CO3 or a thallium(I) polyfluorobenzoate and a polyfluoroaromatic compound in pyridine or 4-methylpyridine. The complexes where R = p-MeC6F4, p-ClC6F4, p-BrC6F4 could be prepared only with Tl2CO3, which also provided cleaner products where both routes were used. The crystal structure of [PtN(Ph)CH2CH2N(p-MeC6F4)}(py)(2)] has been determined and shows a slightly distorted square planar coordination for platinum, with two amide and two cis pyridine nitrogen donors. (C) 1998 Elsevier Science Ltd. All rights reserved.