Crystal structures of the Ba–Cu(I) alkoxides Ba4Cu6(O) (OCEt3)12 and BaCu6(OCEt3)8
摘要:
A single crystal of the Ba-Cu(I) oxo-alkoxide Ba4Cu6(O)(OCEt3)(12) (1) was isolated from the reaction of Ba2Cu4(OCEt3)(8) (2) with oxygen. Oxo-alkoxide 1 crystallizes in the cubic space group 123 with the four Pa atoms distributed tetrahedrally around the central oxide ion and six Cu(OCEt3)(2)(-) units bridging each Pa atom to the three others. The Ba-Cu(I) alkoxides [BaCu(OCEt3)(3)](n) (3) and BaCu6(OCEt3)(8) (4) were also synthesized. Crystals were not obtained for 3, but the easily crystallized 4 has two Cu-3(OCEt3)(4)(-) moieties coordinated to a central Pa atom, and disproportionates in solution to many products. (C) 1998 Elsevier Science Ltd. All rights reserved.
Structure and properties of heterometallic alkoxides containing copper(I)
作者:Andrew P. Purdy、Clifford F. George
DOI:10.1016/0277-5387(94)00301-t
日期:1995.3
The heterometallic Cu-I alkoxides Li4Cu4(OCMe(3))(8) (1) and Ba2Cu4(OCEt(3))(8) (3) were synthesized from the component single metal alkoxides in anhydrous THF solution. Only 1 sublimes without decomposition under vacuum (150 degrees C); 3 is non-volatile. Crystal structures were determined for 1, 3 and the previously reported Na4Cu4(OCEt(3))(8) (2). Compounds 1 and 2 have nearly identical M(4)Cu(4)O(8) cores consisting of two puckered M(2)O(2) rings related by a centre of symmetry and joined at the oxygens by two bridging copper atoms, and at the M edges by two nearly linear O-Cu-O units. Compound 3 has a Ba2(OR)(2) ring containing the centre of symmetry and is bridged by two Cu,(OR), units that are nearly perpendicular to the Ba2O2 ring. The two BaCu2O3 planes in 3 are parallel, but separated by 0.48 Angstrom A. Hydrolysis of compounds 1-3 in THF afforded an orange or orange-brown solid that was converted to the mixed metal oxide by thermolysis, but copper and Cu2O were also produced from the Li4Cu4(OCMe(3))(8) hydrolysis product.