Abstract
The compound Re 2 Cl 5 (C 4 H 10 S 2 ) 2 crystallizes in the monoclinic system with a unit cell of dimensions a = 8.023 ± 0.008 Å, b = 14.355 ± 0.005 Å, c = 8.423 ± 0.006 Å, β = 105.5 ±0-1° occupied by two formula units. The space group is P2 1 / m . The structure, which has been refined to a discrepancy index of 0.064, consists of binuclear units with a staggered rotational configuration. This result together with magnetic data suggests that the compound is best formulated as a zwitterion, Cl(C 4 H 10 S 2 ) 2 Re + (II) ≡ Re¯(III) Cl 4 , with the single unpaired electron occupying a singly degenerate orbital localized on the rhenium atom which has a formal oxidation state of III. The metal-metal bond then has an order of 3. This bonding may be compared with the Re-Re bonding in the octachlorodirhenium (III) anions and other related structures.
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Schedule a callMore From: Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
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