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Synthesis, Formation Constants and Structures of Ternary Copper(I) Complexes with 1,10-Phenanthroline and Alkynes

DOI: 10.1039/DT9920002225

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 2225 - 2230 (1992)

Update date:2022-08-04

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Authors:

Munakata, MegumuMunakata, Megumu

Kitagawa, SusumuKitagawa, Susumu

Kawada, IchiroKawada, Ichiro

Maekawa, MasahikoMaekawa, Masahiko

Shimono, HisaoShimono, Hisao

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Article abstract of DOI:10.1039/DT9920002225

Ternary copper(I) complexes with alkynes and 1,10-phenanthroline (phen) have been prepared and characterized by their formation constants, IR spectra, 1H and 13C NMR spectra.The structures of three complexes, CR)>ClO4 (R = H 1, Ph 2 or CO2Et 3) have been determined using single-crystal X-ray methods.Each copper atom in all three complexes is co-ordinated to two nitrogen atoms of phen and an alkyne molecule in a trigonal-planar arrangement.The alkyne is sideways bonded onto the copper atom.The C<*>C bond distances of 1.190(7) (1), 1.218(13) (2) and 1.193(10) Angstroem (3) are slightly longer than those of the free alkynes and indicate that ? back donation from copper to the alkyne is weak.The reduction of the C<*>C stretching frequency for metal-alkyne complexes is correlated to the acetylenic bend-back angles and the lengthening of the C<*>C distance of the alkyne upon co-ordination.The copper-carbon and -nitrogen distances for 1 and 2 are essentially the same as those for the corresponding olefin complexes.

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Product name:{Cu(1,10-phenanthroline)(phenylacetylene)}ClO4

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