Issue 23, 2000

Dirhodium(II) carboxylates as building blocks. Macrocyclic dimers with vertically stacked Rh24+ units

Abstract

Reaction of Rh2(OAc)4 and H2L (= 2,7-di-tert-butyl-9,9-dimethyl-4,5-xanthenedicarboxylic acid) in N,N-dimethylaniline gave the singly bridged dimer (AcO)3Rh2LRh2(OAc)3 and three doubly bridged dimers, (AcO)2Rh2L2Rh2(OAc)2, (HL)(AcO)Rh2L2Rh2(OAc)2, and (HL)(AcO)Rh2L2Rh2(OAc)(HL). Crystal structures of the last two compounds showed a macrocyclic core with a trans arrangement of bridging dicarboxylates, with one or two of the four remaining acetate ligands replaced by a bridging ligand bound through one carboxylate only. The rhodium cages are separated by 4.5 Å in the direction of the Rh–Rh axes, and offset horizontally by 2.5 Å so that a rhodium atom of one cage lies over a carboxylate oxygen of the other, with Rh  O distances of 2.248–2.286 Å.

Supplementary files

Article information

Article type
Paper
Submitted
20 Sep 2000
Accepted
23 Oct 2000
First published
16 Nov 2000

J. Chem. Soc., Dalton Trans., 2000, 4244-4246

Dirhodium(II) carboxylates as building blocks. Macrocyclic dimers with vertically stacked Rh24+ units

R. P. Bonar-Law, J. F. Bickley, C. Femoni and A. Steiner, J. Chem. Soc., Dalton Trans., 2000, 4244 DOI: 10.1039/B007625M

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