Additions and corrections

The role of halogenated carborane monoanions in olefin hydrogenation catalysed by cationic iridium phosphine complexes

Gemma L. Moxham, Thomas M. Douglas, Simon K. Brayshaw, Gabriele Kociok-Köhn, John P. Lowe and Andrew S. Weller*

Dalton Trans., 2006 (DOI: 10.1039/b612049k). Amendment published 15th February 2007.

The NMR data for the complexes [Ir(PPh₃)₂H₂(L_n)][Y] (Y = [1-closo-CB₁₁H₆Cl₆]^- 1c/c', [BAr^F₄]^- 4c/c', L = CD₂Cl₂ or agostic interactions) were reported incorrectly. Due to trace adventitious water in the sample the NMR data reported were actually for an approximate 50 : 50 mixture of the aqua complexes [Ir(PPh₃)₂H₂(L)(H₂O)][Y] and [Ir(PPh₃)₂H₂(L_n)][Y]. Identification of the aqua complexes comes from addition of small amounts of H₂O to the samples. The new data still do not allow the unambiguous determination of the identity of L (either CD₂Cl₂ or an agostic interaction), and our overall conclusions remain the same in as much as the anion in these systems does not bind to the metal centre. The Authors apologise for this oversight in the original publication.

[Ir(PPh₃)₂H₂(L_n)][BAr^F₄] (4c) and [Ir(PPh₃)₂H₂(L)(H₂O)][BAr^F₄] (~50/50 mixture)
¹H NMR (CD₂Cl₂ 298 K selected) 7.72–6.95 (m, ArH), -26.25 (br s, IrH). ³¹P{¹H} NMR (CD₂Cl₂ 298 K) 23.1 (br s).

[Ir(PPh₃)₂H₂(L_n)][BAr^F₄] (4c)
¹H NMR (CD₂Cl₂ 250 K selected) -25.57 (t, J(PH) 15 Hz, IrH). ³¹P{¹H} NMR (CD₂Cl₂ 250 K selected) 23.1 (s). ¹H NMR (CD₂Cl₂ 200 K selected) -25.16 (t, J(PH) 15 Hz, IrH). ³¹P{¹H} NMR (CD₂Cl₂ 200 K selected) 23.2 (s).

[Ir(PPh₃)₂H₂(L)(H₂O)][BAr^F₄]
¹H NMR (CD₂Cl₂ 250 K selected) -27.81 (br s, IrH). ³¹P{¹H} NMR (CD₂Cl₂ 250 K selected) 27.0 (s). ¹H NMR (CD₂Cl₂ 200 K selected) -26.76 (br s, IrH), -28.18 (br s, IrH). ³¹P{¹H} NMR (CD₂Cl₂ 200 K selected) 27.0 (s).

The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.

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