Issue 16, 1974

Transition-metal derivatives of arenediazonium ions. Part VII. Fluorine-19 nuclear magnetic resonance and nitrogen-l5 infrared labelling studies on some benzene-, meta-fluorobenzene-, and para-fiuorobenzene-diazo-complexes of iron, molybdenum, platinum, and tungsten

Abstract

19 F N.m.r. spectra of fifteen different classes of m- and p-fluorobenzenediazo-complexes containing iron, molybdenum, platinum, or tungsten have been measured. The 19F n.m.r. technique is shown to be a sensitive tool for determination of the degree of M–N2Ar π-bonding provided all complexes studied are of the same structural type. Direct evidence has been obtained for the view that the cation ArN2+ is a poorer π-acceptor than NO+. The ν(NN) stretching frequencies of the ArN2 complexes (Ar = Ph, m-FC6H4, or p-FC6H4) have been identified by 15N14N labelling. Many of these complexes show an unexpected multiplicity of bands associated with the N2chromophore.

Article information

Article type
Paper

J. Chem. Soc., Dalton Trans., 1974, 1837-1840

Transition-metal derivatives of arenediazonium ions. Part VII. Fluorine-19 nuclear magnetic resonance and nitrogen-l5 infrared labelling studies on some benzene-, meta-fluorobenzene-, and para-fiuorobenzene-diazo-complexes of iron, molybdenum, platinum, and tungsten

W. E. Carroll, M. E. Deane and F. J. Lalor, J. Chem. Soc., Dalton Trans., 1974, 1837 DOI: 10.1039/DT9740001837

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