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Preparation of [(C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>Rh<sub>2</sub>B<sub>17</sub>H<sub>19</sub>]via a degradative insertion from anti-B<sub>18</sub>H<sub>22</sub>, and a possible mechanism for anti→syn macropolyhedral interconversion
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1986
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X-ray CrystallographyInorganic ChemistryCrystal StructureEngineeringNatural SciencesAnti→syn Macropolyhedral InterconversionCoordination ComplexMolecular BiologyBoron Vertex LossStructure ElucidationReaction IntermediateDegradative InsertionChemistryEffective Syn ConfigurationCrystallographyCrystal Structure DesignPossible MechanismBiomolecular Engineering
Reaction of [(C5Me5)RhCl2]2 with anti-B18H22 in the presence of base yields, via boron vertex loss, a 19-vertex dirhodanonadecaborane [(C5Me5)2Rh2B17H19] of which the structure has been confirmed by X-ray crystallography; it comprises a 12-vertex nido{RhB11} subcluster and a 10-vertex nido{5-RhB9} subcluster conjoined with a common triangular {B3} face so as to generate an effective syn configuration.