Synthesis and spectroscopic studies of group 6 metal carbonyl complexes with a novel cyclotriphosphazane ligand

Mitchell W. Denker, Monte Helm

Research output: Contribution to journalArticle

Abstract

The syntheses and spectroscopic properties of Cr(0) and Mo(0) carbonyl complexes involving the novel cyclotriphosphazane (C6H 4N2)(PPh)3C6H4(NH) 2 (1) are reported. The cyclotriphosphazane 1 is an interesting cyclic ligand that contains two unique types of phosphorus coordination environments as well as potential N-H reactivity. Reactions of 1 with one, two and excess molar equivalents of M(CO)5(THF) (M = Cr, Mo and W) were studied, leading to two new cyclophosphazane metal complexes (C 6H4N2)(PPh)3C6H 4(NH)2·2M(CO)5 (M = Cr, Mo), where metal coordination is observed only to the phosphorus atoms that have their lone pair of electrons oriented exodentate to the phosphazane ring. The structures for the two new metal complexes are supported by 1H, 13C{ 1H} and 31P{1H} NMR spectroscopy. The reaction of 1 with W(CO)5(THF) yields a mixture of ring opened and decomposition phosphazane products.

Original languageEnglish
Pages (from-to)227-231
Number of pages5
JournalSynthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry
Volume35
Issue number3
DOIs
Publication statusPublished - 2005

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Carbon Monoxide
Metals
Coordination Complexes
Ligands
Phosphorus
ligands
phosphorus
synthesis
metals
rings
Nuclear magnetic resonance spectroscopy
reactivity
Decomposition
decomposition
Atoms
nuclear magnetic resonance
Electrons
products
spectroscopy
atoms

Keywords

  • Chromium complexes
  • Cyclophosphazane
  • Molybdenum complexes
  • Pentacarbonyl complexes
  • Phosphazane

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

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title = "Synthesis and spectroscopic studies of group 6 metal carbonyl complexes with a novel cyclotriphosphazane ligand",
abstract = "The syntheses and spectroscopic properties of Cr(0) and Mo(0) carbonyl complexes involving the novel cyclotriphosphazane (C6H 4N2)(PPh)3C6H4(NH) 2 (1) are reported. The cyclotriphosphazane 1 is an interesting cyclic ligand that contains two unique types of phosphorus coordination environments as well as potential N-H reactivity. Reactions of 1 with one, two and excess molar equivalents of M(CO)5(THF) (M = Cr, Mo and W) were studied, leading to two new cyclophosphazane metal complexes (C 6H4N2)(PPh)3C6H 4(NH)2·2M(CO)5 (M = Cr, Mo), where metal coordination is observed only to the phosphorus atoms that have their lone pair of electrons oriented exodentate to the phosphazane ring. The structures for the two new metal complexes are supported by 1H, 13C{ 1H} and 31P{1H} NMR spectroscopy. The reaction of 1 with W(CO)5(THF) yields a mixture of ring opened and decomposition phosphazane products.",
keywords = "Chromium complexes, Cyclophosphazane, Molybdenum complexes, Pentacarbonyl complexes, Phosphazane",
author = "Denker, {Mitchell W.} and Monte Helm",
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AU - Helm, Monte

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N2 - The syntheses and spectroscopic properties of Cr(0) and Mo(0) carbonyl complexes involving the novel cyclotriphosphazane (C6H 4N2)(PPh)3C6H4(NH) 2 (1) are reported. The cyclotriphosphazane 1 is an interesting cyclic ligand that contains two unique types of phosphorus coordination environments as well as potential N-H reactivity. Reactions of 1 with one, two and excess molar equivalents of M(CO)5(THF) (M = Cr, Mo and W) were studied, leading to two new cyclophosphazane metal complexes (C 6H4N2)(PPh)3C6H 4(NH)2·2M(CO)5 (M = Cr, Mo), where metal coordination is observed only to the phosphorus atoms that have their lone pair of electrons oriented exodentate to the phosphazane ring. The structures for the two new metal complexes are supported by 1H, 13C{ 1H} and 31P{1H} NMR spectroscopy. The reaction of 1 with W(CO)5(THF) yields a mixture of ring opened and decomposition phosphazane products.

AB - The syntheses and spectroscopic properties of Cr(0) and Mo(0) carbonyl complexes involving the novel cyclotriphosphazane (C6H 4N2)(PPh)3C6H4(NH) 2 (1) are reported. The cyclotriphosphazane 1 is an interesting cyclic ligand that contains two unique types of phosphorus coordination environments as well as potential N-H reactivity. Reactions of 1 with one, two and excess molar equivalents of M(CO)5(THF) (M = Cr, Mo and W) were studied, leading to two new cyclophosphazane metal complexes (C 6H4N2)(PPh)3C6H 4(NH)2·2M(CO)5 (M = Cr, Mo), where metal coordination is observed only to the phosphorus atoms that have their lone pair of electrons oriented exodentate to the phosphazane ring. The structures for the two new metal complexes are supported by 1H, 13C{ 1H} and 31P{1H} NMR spectroscopy. The reaction of 1 with W(CO)5(THF) yields a mixture of ring opened and decomposition phosphazane products.

KW - Chromium complexes

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KW - Molybdenum complexes

KW - Pentacarbonyl complexes

KW - Phosphazane

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