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Ir intensity measurements on group VIIIB, C metal-alkyne complexes by H.L.M. van Gaal; M.W.M. Graef; A. van der Ent is a Chemistry article available to read on EtoBox.

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The integrated molar absorption coefficients Atilt of the C-C stretching-vibration of the coordinated alkynes of Rh, Ir, Ni and Pt complexes of hexafluorobutyne (HFB), tolane and hexyne have been measured. A relative scale of donor and acceptor interactions in the complexes has been calculated from the measured values of Kti, and A(v') = v'(free alkyne) -Y'(coordinated alkyne). Competitive as well as synergic relations between donor and acceptor bonding have been found. The order of increasing donor and decreasing acceptor bonding has been found for the alkynes HFB + tolane + hexyne. Within the series of complexes of a given alkyne, the acceptor bond increases for the metals in the order: Pt(I1) (4) < Rh(1) (4) < Ir(1) (4) < Pt(I1) (5) < Ni(0) (3) < Pt(0) (3) (coordination number in parentheses) and the donor bonding increases synergically with the acceptor bonding in this series.

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Author

H.L.M. van Gaal; M.W.M. Graef; A. van der Ent

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-328X)

Published

1977

Language

AF

Field

Chemistry (Physical Sciences)