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Lewis-Base Adducts of Group 11. Metal(I) Compounds. XXXI. Reaction of 2,6-Bis[l-phenyl-1-(pyridin-2-yl)ethyl]pyridine (L), and Copper(I) Halides in Acetonitrile: Structural Characterization of Salts of the [(MeCN)Cu(meso-L)]+ Cation

journal contribution
posted on 2023-05-25, 22:57 authored by Canty, AJ, Engelhardt, LM, Healy, PC, Kildea, JD, Minchin, NJ, White, AH
Reaction of 2,6-bis[l-phenyl-1-(pyridin-2-yl)ethyl pyridine, L, with copper(I) chloride, bromide, and iodide in acetonitrile solution has been shown to yield salts, structurally characterized by single-crystal X-ray diffraction methods as [(MeCN)CuL]+ [ClCuCl]-, (I), [(MeCN)CuL]+2[XCuX2CuX]2-, X = Br (2), I (3) (both isomorphous), all as yellow needles, and a form of (3), orange blocks, as the hemiacetonitrile solvate, (4), [(MeCN)CuL]+2[ICuI2CuI]2-.MeCN. The same cation is common to all four species, containing four-coordinate copper(I), with L as meso-tridentate ligand; in (4), the most precisely defined example, Cu-N(MeCN) is 1.91965) A, the shortest copper(I) acetonitrile distance known, while Cu-N(L) are 2.065(5)-2.073(5) A. The reason for non-formation of species of the type [LCuX] appears to lie in the tridentate ligand conformation which permits coordination of acetonitrile but not larger halide species.

History

Publication title

Australian Journal of Chemistry

Volume

40

Article number

11

Number

11

Pagination

1881-1891

ISSN

0004-9425

Publication status

  • Published

Repository Status

  • Restricted

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