Structural characterization and coordination behavior of 1,2-diphosphino and 1,2-diarsino-diborane(4) compounds

Afarin Moezzi, Marilyn M. Olmstead, Doris C. Pestana, Karin Ruhlandt, Philip P. Power

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Reaction of either LiPPh2 or LiAsMes2 with the diborane(4) compound (Me2N) BrBBBr(NMe2) affords the compounds (Me2N)(Ph2P)BB(PPh2)(NMe2), 1, and (Me2N) (Mes2As)BB(AsMes2)(NMe2)-0.5PhMe, 2-0.5PhMe (Mes = 2,4,6-Me3C6H2-). Both 1 and 2 feature normal B-B single bond lengths; However, the empty boron p-orbitals display strong π-interactions with the dimethylamino substituents. The B-P and B-As distances and the pyramidal phosphorus and arsenic geometries are consistent with single bonding. Furthermore, the stereochemical activity of the phosphorus and arsenic lone pairs is demonstrated by the ready formation of the complex cis-[Cr(CO)4(Me2N)(Ph2P) BB(PPh2)(NMe2)] C6H6, 3-C6H6, by treatment of 1 with [Cr(CO)4(2,5-norbornadiene)]. Compounds 1-3 were characterized by X-ray crystallography, nB and 31P NMR spectroscopy, and by IR spectroscopy in the case of 3.

Original languageEnglish (US)
Pages (from-to)197-206
Number of pages10
JournalMain Group Chemistry
Volume1
Issue number2
DOIs
StatePublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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