Reactivity of molybdenum complexes containing both NHNPhR and NNPhR ligands (R = Ph, Me) toward hydridotris(pyrazolyl) borate, Tp and hydridotris(3,5-dimethylpyrazolyl)borate, Tp*, ligands. X-ray crystal structure of [TpMo(NNMePh)2Cl]

Carolina Manzur, David Carrillo, Francis Robert, Pierre Gouzerh, Paul Hamon, Jean René Hamon

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Molybdenum complexes containing mixed disubstituted organohydrazido(1 - ) and organohydrazido(2 - ) ligands, [Mo(NHNPhR)-(NNPhR)(acac)Cl2], R=Ph (I), R=Me (II), react in acetonitrile with sodium hydridotris(pyrazolyl)borate, NaTp, or in toluene with potassium hydridotris(3,5-dimethylpyrazolyl)borate, KTp*, to afford the neutral six-coordinated species formulated as [TpMo(NNPhR)2Cl], R=Ph (III), R=Me (FV) and [Tp*Mo(NNPhR)2Cl], R=Ph (V), R=Me (VI). These compounds have been characterized by elemental analysis, by IR, UV - visible, 1H and 13C NMR spectroscopy, and by mass spectrometry. The electrochemical behavior of complexes III-VI has also been studied by cyclic voltammetry. The X-ray crystal structure of IV has been determined. Crystals are parallelepiped, space group Pbnm, with a=7.468(2), b=18.483(3), c=19.052(3) Ä, α=β=γ=90° and Z=4. The structure was solved and refined by full-matrix, least-squares methods to R and Rw values of 0.038 and 0.049, respectively. The complex displays a distorted octahedral geometry with symmetrical organohydrazido(2 - ) ligands adopting the nearly linear mode (Mo-N-N=169.4(3)°). This linearity and the short bond distances (Mo-N = 1.771(4), N-N = 1.308(5) Å) indicate an extensive π-electronic delocalization throughout the Mo-N-N fragment.

Original languageEnglish
Pages (from-to)199-204
Number of pages6
JournalInorganica Chimica Acta
Volume268
Issue number2
DOIs
StatePublished - 10 Feb 1998
Externally publishedYes

Keywords

  • Crystal structures
  • Hydrazido complexes
  • Hydridotris(3,5-dimethylpyrazolyl)-borate
  • Hydridotris(pyrazolyl)borate
  • Molybdenum complexes
  • Synthesis

Fingerprint

Dive into the research topics of 'Reactivity of molybdenum complexes containing both NHNPhR and NNPhR ligands (R = Ph, Me) toward hydridotris(pyrazolyl) borate, Tp and hydridotris(3,5-dimethylpyrazolyl)borate, Tp*, ligands. X-ray crystal structure of [TpMo(NNMePh)<sub>2</sub>Cl]'. Together they form a unique fingerprint.

Cite this