Novel porphyrinaaathalliumaaaplatinum complex with aaanakedaaa metalaaametal bond: multinuclear NMR characterization of [(tpp)TlaaaPt(CN)₅]^2aaa and [(thpp)Tl

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• 作者：Ma ; Guibin ; Maliarik ; Mikhail ; Sun ; Licheng ; Glaser ; Julius
• 关键词：Metal??????metal bond ; Porphyrin complexes ; Platinum compounds ; Thallium compounds ; Solution structure
• 刊名：Inorganica Chimica Acta
• 出版年：2004
• 出版时间：November 15, 2004
• 年：2004
• 卷：357
• 期：14
• 页码：4073-4077
• 全文大小：338 K

文摘

The novel porphyrinaaathalliumaaaplatinum complexes with aaanakedaaa metalaaametal bond, with the composition [(tpp)TlaaaPt(CN)₅]^2aaa (1) and [(thpp)TlaaaPt(CN)₅]^2aaa (2) (tpp=tetraphenylporphrin and thpp=tetrakis(4-hydroxyphenyl)-porphine), were synthesized and characterised by multinuclear NMR (²⁰⁵Tl, ¹⁹⁵Pt, ¹³C and ¹H) and Raman spectroscopies in solution. The presence of a direct PtaaaTl metalaaametal bond in the complexes is convincingly confirmed by a very strong one-bond ¹⁹⁵Ptaaa²⁰⁵Tl spinaaaspin coupling (47.8 and 48.3 kHz for 1 and 2, respectively) detected in both Pt and Tl NMR spectra. The corresponding force constant in molecule 1, 1.92 Ncm^aaa1, was calculated using Raman stretching frequency of the PtaaaTl vibration and is characteristic for a single metalaaametal bond.