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Evidence on Ligand Strengths from the Crystal Structures of , , 2>*PhCHO and from Dimethylformamide (dmf), Dimethylacetamide (dma), Benzaldehyde and Acetophenone

DOI: 10.1039/DT9930003111

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 3111 - 3116 (1993)

Update date:2022-08-05

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Authors:

Jin, SongchunJin, Songchun

McKee, VickieMcKee, Vickie

Nieuwenhuyzen, MarkNieuwenhuyzen, Mark

Robinson, Ward T.Robinson, Ward T.

Wilkins, Cuthbert J.Wilkins, Cuthbert J.

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Article abstract of DOI:10.1039/DT9930003111

X-Ray crystal structure determinations have been made for the fac octahedral complexes 1, 2 and <2>*PhCHO 3, from dimethylformamide (dmf), dimethylacetamide and benzaldehyde and the trigonal-bipyramidal complex 4 from acetophenone.The average In-O bond length for 3 is ca. 0.07 Angstroem greater than for 1 or 2.In 4, In-O is 0.07 Angstroem longer than that known for from tetramethylurea (tmu).An extension of the comparison to structures involving other ligands shows there to be a general correspondence between In-O bond lengths and ligand donor values.By contrast with the weak co-ordination of aldehydes and ketones, co-ordination of an amide is enhanced through polarisation.In the crystal of 3, individual molecules are paired, almost centrosymmetrically, with intermeshing of their PhCHO ligands.

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