Photochemical synthesis of (η6-arene)chromium hydrido stannyl and (η6-arene)chromium bis(stannyl) complexes

Abbas Khaleel, Kenneth J. Klabunde

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12 Citations (Scopus)

Abstract

Photolysis of (η6-arene)Cr(CO)3 complexes and HSnPh3 in aromatic solvents at room temperature has led to two classes of complexes: hydrido stannyl compounds containing the η2-H-SnPh3 ligand and bis(stannyl) compounds containing two SnPh3 ligands. The ratio between the two complexes simultaneously produced depends on the choice of the arene. Complexes with different arenes (mesitylene, toluene, benzene, fluorobenzene, and difluorobenzene) have been obtained and characterized including X-ray structures for (η-6C6H3(CH3) 3)Cr(CO)2 (H)(SnPh3) (1a). (η6-C6H3)3)(η 6CH3)3)Cr(CO)2(SnPhs 3)2 (1b), (η-C6-H6H3F)Cr(CO)2(SnPh 3)2 (4b), and (η-C6C6H4 (CO)2(SnPh3)2 (5b). X-ray crystallography of the last three compounds has given the following results: 1b, monoclinic, space group P21/c (No. 14), a = 13.905(4) Å, b = 18.499(2) Å, c = 17.708(2) Å, Z = 4, V = 4285(1) Å3; 4b, orthorhombic, space group Pca21 (No. 29), a = 16.717(2) Å, b = 18.453(2) Å, c = 25.766(2) Å, Z = 8, V = 7948(2) Å3; 5b, monoclinic, space group P21/c (No. 14), a = 13.756(2) Å, b = 18.560(2) Å, c = 17.159(2) Å, Z = 4, V = 4372(2) Å3. The relatively high J(119Sn-Cr-H) and J(117Sn-Cr-H) values as well as the X-ray structural data provide evidence for the existence of three-center two-electron bonds in the hydrido stannyl complexes. The 1H NMR data of the complexes are compared with chromium-arene bond distances, and a sensible trend is observed and discussed.

Original languageEnglish
Pages (from-to)3223-3227
Number of pages5
JournalInorganic Chemistry
Volume35
Issue number11
DOIs
Publication statusPublished - Jan 1 1996
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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