几个铊(III)卟啉络合物[铊(POR)X]与轴向配体×=梅科2,CF 3 CO 2,氯,溴,L,CN,SCN或N 3,已经获得通过从配位体交换反应相应的三氟acet(III)。所有化合物均通过1 H NMR,UV / VIS光谱和元素分析进行表征。通过X射线晶体学对14种化合物进行了详细研究,以获取有关轴向配体对主族金属卟啉中大环核构象的影响的信息,并建立th的分子立体化学(III))带有氰基,乙酰基,硫氰酸根基,溴基,碘基和叠氮基作为轴向配体的卟啉。
Pseudohalogeno-bonding of thallium(III) porphyrins, stabilisation of isocyano bonding. Crystal structure of isocyano(5,10,15,20-tetraphenylporphyrinato)thallium(III)
作者:Athanassios G. Coutsolelos、Anna Tsapara、Dimitra Daphnomili、Donald L. Ward
DOI:10.1039/dt9910003413
日期:——
Thallium(III) porphyrin complexes of the type [Tl(por)X] [por = 5,10,15,20-tetraphenyl- (tpp) or 2,3,7,8,12,13,17,18-octaethyl-porphyrinate(2-) (oep); X = N3, SCN or NC] have been prepared. The stereochemistry of the metal has been established by IR and H-1 NMR spectroscopy and isocyano bonding in [Tl(tpp)(NC)] confirmed by X-ray diffraction methods using Mo-K-alpha radiation. Crystals are monoclinic, space group P2(1)/n, with a = 10.061(8), b = 16.161(12), c = 21.173(15) angstrom, beta = 90.80(6)-degrees and Z = 4; R = 0.023 and R' = 0.028 for 4833 observed reflections. The thallium atom is five-co-ordinated by the four nitrogen atoms (N(p)) of the porphyrin plane and one nitrogen atom, N(25), of the isocyano group: mean Tl-N(p) 2.222(10), Tl-N(25) 2.260(3) angstrom, N(25)-Tl-N(p) 110.4(1) Tl-N(25)-C(26) 175.3(4)-degrees.