European Journal of Inorganic Chemistry

Cover image for Vol. 2014 Issue 28

Editor: Karen Hindson, Deputy Editor: Preeti Vashi

Impact Factor: 2.965

ISI Journal Citation Reports © Ranking: 2013: 10/44 (Chemistry Inorganic & Nuclear)

Online ISSN: 1099-0682

Associated Title(s): Angewandte Chemie International Edition, Chemistry - A European Journal, Chemistry – An Asian Journal, ChemistryOpen, ChemCatChem, Zeitschrift für anorganische und allgemeine Chemie

2007_26/2007Phospha- and Arsaalkenes RE=C(NMe2)2 (E = P, As) as Novel Phosphinidene- and Arsinidene-Transfer Reagents (Eur. J. Inorg. Chem. 26/2007)

The cover picture shows the reaction between the phosphavinylidene complexes [(η5-C5H5)(CO)2M=P=C(SiMe3)2] and the inversely polarized phosphaalkene tBuP=C(NMe2)2, which affords η3-1,2-diphosphaallyl complexes by smooth transfer of the phosphinidene unit onto the electrophilic ligand of the precursors. The molecular structure underlines the unsymmetrical η3-ligation of the heteroallyl ligand to the metal with the tert-butyl substituent syn to the central phosphorus atom. Treatment of the phosphavinylidene complexes with P-aroylphosphaalkenes leads to decomposition. In contrast, phosphavinylidene complexes and As-aroylarsaalkenes yield complexes featuring cyclic phosphenium ligands with an As=C bond. It is believed that the first step of this process is a formal [2+1] cycloaddition between the P=C bond and the aroylarsinidine to give a three-membered ring, which subsequently incorporates the CO unit to afford the final product. In all cases, tetrakis(dimethylamino)ethene is formed as a byproduct. Details are presented in the Microreview by L. Weber on p. 4095 ff.

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