New strategy to mixed-group 6 metal carbonyl telluride complexes: Completion of the trigonal bipyramidal clusters [Te2CrM 2(CO)10]2- (M = Cr, Mo, W)

Minghuey Shieh, Shu Fen Lin, Yu Wen Guo, Miao Hsing Hsu, Yun Wen Lai

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The new series of tellurium-containing trigonal bipyramidal clusters [Te2CrM2(CO)10]2- (M = Cr, 2a; Mo, 2b; W, 2c) has been synthesized from the ring closure reactions of the ring complexes [Te2Cr2M2(CO)18] 2- (M = Cr, la; Mo, 1b; W, 1c) in refluxing acetone solutions. The mixed-metal ring complexes [Te2Cr2M2(CO) 18]2- (M = Mo, 1b; M = W, 1c) can be obtained readily from the metal expansion reactions of the dichromium complex [Te{Cr(CO) 5}2]2- with M(CO)6 (M = Mo, W) in MeCN. The ring complexes [Te2Cr2M2(CO) 18]2- (M = Mo, 1b; W, 1c) each display a Te 2M2 ring with each Te atom externally coordinated with one Cr(CO)5 group, while the new group 6-containing trigonal bipyramidal clusters [Te2CrM2(CO)10]2- (M = Cr, 2a; Mo, 2b; W, 2c) each consist of a CrM2 trigonal plane capped above and below by two tellurides. Complexes 1b-2c are fully characterized by IR, 125Te NMR spectroscopy, and single-crystal X-ray analysis. This paper describes a new methodology to the highly strained group 6 metal clusters [Te2CrM2(CO)10]2- (M = Cr, 2a; Mo, 2b; W, 2c) from the ring closure reactions of their corresponding ring complexes [Te2Cr2M2(CO)18]2- (M = Cr, 1a; Mo, 1b; W, le), and the interesting transformations and structural features of the new complexes 1b-2c are systematically studied as well.

Original languageEnglish
Pages (from-to)5182-5187
Number of pages6
JournalOrganometallics
Volume23
Issue number22
DOIs
Publication statusPublished - 2004 Oct 25

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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