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

被引：48

作者：

Al-Obaidi, A

Baranovic, G

Coyle, J

Coates, CG

McGarvey, JJ ^{[1
]}

McKee, V

Nelson, J

机构：

[1] Queens Univ Belfast, Sch Chem, Belfast BT9 5AG, Antrim, North Ireland

[2] Open Univ, Dept Chem, Milton Keynes MK7 6AA, Bucks, England

[3] Rudjer Boskovic Inst, Zagreb 11001, Croatia

来源：

INORGANIC CHEMISTRY | 1998年 / 37卷 / 14期

关键词：

D O I：

10.1021/ic971274z

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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.

引用

页码：3567 / 3574

页数：8

共 38 条

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