Naslov
Raman spectroscopy of three average-valence dicopper cryptates - Evidence for copper-copper bonding

Autori
Al-Obaidi, A. ; Baranović, Goran ; Coyle, J. ; Coates, C.G. ; McGarvey, J.J. ; McKee, V. ; Nelson, J.

Izvornik
Inorganic chemistry (0020-1669) 37 (1998), 14; 3567-3574

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
cytochrome-c-oxidase; site; denitrificans; complex; domain

Sažetak
Comparison of the X-ray structures of two pairs of dicopper(I) and dicopper(l.5) cryptates provides evidence (over 0.5 Angstrom, contraction of the internuclear distance in one pair) for copper-copper bond formation. Although resonance Raman spectroscopy fails to identify a pure copper-copper stretching mode, because of extensive mixing of several low-frequency stretching and bending modes, isotopic substitution experiments indicate significant Cu-Cu character in a band around 250 cm(-1). A normal coordinate analysis broadly supports the spectroscopic findings. X-ray crystal structures are presented for the dicopper(1.5) complex Cu(2)imBT(ClO4)(3), C18H30C13Cu2N8O12, a = 9.140(4) Angstrom, c = 30.35(3) Angstrom, rhombohedral, R32, Z = 3, and the dicopper(I) Cu(2)imbistrpn(ClO4)(2), C24H42Cl2Cu2N8O8, a = 9.279(2) Angstrom, c = 32.846(9) Angstrom, rhombohedral, R32, Z = 3.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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