Acta Crystallogr E Crystallogr Commun
Chemistry Division, Code 6123, Naval Research Laboratory, 4555 Overlook Av, SW, Washington DC 20375-5342, USA.
Published: June 2021
In the title compound, [AlBr(CH)(CHO)], the mol-ecule lies on a crystallographic twofold axis passing through the bridging C atom. Each Al atom is four-coordinate, being bonded to two bromide ions, bridging the CH group as well as the oxygen atom of a diethyl ether ligand in a slightly distorted tetra-hedral arrangement with angles ranging from 101.52 (8) to 116.44 (5)°. The Al-CH-Al angle, 118.4 (2)°, is the smallest observed for a structure where this moiety is not part of a ring. In the crystal, weak C-H⋯Br inter-actions, characterized as (12) rings, link the mol-ecules into ribbons in the [101] direction. The title compound is monomeric and coordinatively saturated in the solid state, as each aluminum is four-coordinate, but in solution the ether mol-ecules from either or both Al atoms can dissociate, and would be expected to rapidly exchange, and this is supported by NMR data.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8183446 | PMC |
http://dx.doi.org/10.1107/S2056989021005302 | DOI Listing |
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