Formation of phosphino-substituted isocyanate by reaction of CO2 with group 2 complexes based on the (Me3Si)(i-Pr2P)NH ligand

Inorg Chem. 2012 Jan 16;51(2):1162-9. doi: 10.1021/ic202399z. Epub 2011 Dec 29.

Abstract

The group 2 complexes [(Me(3)Si)(i-Pr(2)P)N](2)M(THF)(x) (M = Mg, x = 1; M = Ca/Sr, x = 2) as well as an unusual dimagnesium complex {[(Me(3)Si)(i-Pr(2)P)N](3)Mg}Mg(n-C(4)H(9)) have been prepared and characterized by multinuclear NMR spectroscopy and single crystal X-ray diffraction. Each complex was shown to react with CO(2) under extremely mild conditions (15 min, 1 atm, room temperature) to give the isocyanate (i-Pr)(2)P-N═C═O. The independent syntheses of (i-Pr)(2)P-N═C═O and the carbodiimide dimer [(i-Pr)(2)PNCNP(i-Pr)(2)](2) are also reported.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Carbodiimides / chemistry
  • Carbon Dioxide
  • Crystallography, X-Ray
  • Isocyanates / chemical synthesis
  • Isocyanates / chemistry*
  • Ligands
  • Magnesium / chemistry
  • Magnetic Resonance Spectroscopy
  • Molecular Structure
  • Organometallic Compounds / chemistry
  • Phosphines / chemistry*

Substances

  • Carbodiimides
  • Isocyanates
  • Ligands
  • Organometallic Compounds
  • Phosphines
  • Carbon Dioxide
  • phosphine
  • Magnesium