W2Cl4(NR2)2(PR′3)2molecules - 9. New mixed valent WIII/WIVface-sharing bioctahedral complexes with chelating bis(diphenylphosphino)propane and dialkylamido ligands

F. Albert Cotton, Evgeny V. Dikarev, Wai Yeung Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

The triply-bonded ditungsten(III) species trans,trans-W2Cl4(NBun2)2(dppp) (1) and a new mixed-valent WIII/WIVcomplex (dppp)ClW(μ-Cl)3WCl2(NBun2) (3) have been isolated from the reaction of W2Cl4(NBun2)2(NHBun2)2with 1,3-bis(diphenylphosphino)propane (dppp). A complex similar to 3, (dppp)ClW(μ-Cl)3WCl2(NEt2) (2), has also been prepared. Both 2 and 3 are characterized by a W7+2core and they adopt face-sharing bioctahedral geometry with a chelating dppp ligand. The W - W distances in 2 and 3 are both 2.660(1) Å and each of them shows an EPR signal at g = 1.88. The structure of 1 contains a W6+2core with a W - W distance of 2.3055(8) Å. It has a bridging dppp ligand and a trans,trans stereochemistry.
Original languageEnglish
Pages (from-to)3893-3898
Number of pages6
JournalPolyhedron
Volume16
Issue number22
DOIs
Publication statusPublished - 15 Sep 1997
Externally publishedYes

Keywords

  • Bis(diphenilphosphino)propane complexes
  • Chelating diphosphine ligand
  • Crystal structure
  • Face-sharing bioctahedral complexes
  • Tungsten complexes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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