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SYNTHESIS AND REACTIVITY OF LEWIS ACID/BASE STABILIZED PHOSPHANYLBORANES AND ARSANYLBORANES

SYNTHESIS AND REACTIVITY OF LEWIS ACID/BASE STABILIZED PHOSPHANYLBORANES AND ARSANYLBORANES A. Adolf , K.-Ch. Schwan, U. Vogel, P. Hoemensch and M. Scheer* * Institute of Inorganic Chemistry, University of Regensburg, D- 93040 Regensburg, Germany. Introduction:

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SYNTHESIS AND REACTIVITY OF LEWIS ACID/BASE STABILIZED PHOSPHANYLBORANES AND ARSANYLBORANES

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  1. SYNTHESIS AND REACTIVITY OF LEWIS ACID/BASE STABILIZED PHOSPHANYLBORANES AND ARSANYLBORANES A. Adolf, K.-Ch. Schwan, U. Vogel, P. Hoemensch and M. Scheer* * Institute of Inorganic Chemistry, University of Regensburg, D- 93040 Regensburg, Germany Introduction: The parent compounds of phosphanyl- and arsanylboranes [H2EBH2] (E = P, As) have not yet been synthesised or even detected by matrix isolation experiments. We are able to synthesise the first Lewis acid/base stabilised derivates A (LA = Lewis acid) [1]. Furthermore we succeeded in synthesising (C6F5)3BH2PH2NMe31 possesing a main group element Lewis acid. Synthesis: 1 2a 2b Reactivity: By exploring the reactivity of Lewis acid/base stabilised phosphanylboranes and –arsanes 2a,b towards Pt(0) complexes we obtained oxidative addition products 3a,b (a: E = P, b: E = As). Complex 3a is unstable in solution at r.t. and loses carbon monoxide to form 4a in a reversible reaction. 4b (E = As) is only formed via thermolysis of 3b. 3a 4a Compound 1 reacts with the Pt(0) complex [(PPh3)2Pt(C2H4)] to form 5 which could not been crystalised yet. However, the structure of 5 can be deduced from the NMR-spectra. 5 Section of the 1H-NMR spectrum showing the signals of the hydride ligand d = -5,64ppm, ddd, 1JHPt = 842Hz, 2JHP(2) = 172Hz, 2JHP = 27Hz, 2JHP = 16 Hz, H-Pt [1] U. Vogel, P.Hoemensch, K.-Ch. Schwan, A. Y. Timoshkin, M. Scheer, Chem. Eur. J.2003, 9, No. 2

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