Complexes of the [Re63-Se)8] 2+ core-containing clusters with the water-soluble 1,3,5-triaza-7-phosphaadamantane (PTA) ligand: Unexpected ligand protonation and related studies

Xiaoyan Tu, Gary S. Nichol, Ruiyao Wang, Zhiping Zheng

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Abstract

Three new complexes of the [Re63-Se) 8]2+ core-containing clusters with the water-soluble trialkylphosphine ligand 1,3,5-triaza-7-phosphaadamantane (PTA), [Re 63-Se)8(PEt3) 5(PTA)](SbF6)2 (P5PTA, 1), [Re 63-Se)8(PEt3) 5(PTAH)][Re63-Se)8(PEt 3)5(PTA)](SbF6)5 (2), and [Re 63-Se)8(PEt3) 5(PTAH)]2(HBr)(SbF6)2Br4 (3) have been prepared and structurally characterized. Unexpected protonation of the cluster-bound PTA ligand was observed when coordination of 1 with HgI 2 was attempted, affording compound 2 featuring a protonated PTA ligand, PTAH. Deliberate acidification of 1 with HBr produced compound 3, and the protonation was investigated by using 31P NMR spectroscopy. Crystallographic studies revealed distinct structural distortions of the ligand as a result of protonation.

Original languageEnglish (US)
Pages (from-to)6030-6038
Number of pages9
JournalDalton Transactions
Issue number43
DOIs
StatePublished - Nov 6 2008

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ASJC Scopus subject areas

  • Inorganic Chemistry

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