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Crystalline binuclear cis- and trans-chlorotin(<scp>II</scp>) amides [Sn(µ-Cl)(NR<sub>2</sub>)]<sub>2</sub>, the cis-1a ⇌trans-1b isomerisation for [NR<sub>2</sub>= NCMe<sub>2</sub>(CH<sub>2</sub>)<sub>3</sub>CMe<sub>2</sub>], and the X-ray structures of 1a and of trans-[Sn(µ-Cl){N(SiMe<sub>3</sub>)<sub>2</sub>}]<sub>2</sub>
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1991
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Inorganic ChemistryCrystal StructureX-ray StructuresEngineeringCrystalline Binuclear ChlorotinBiochemistryNmr SpectroscopyIntramolecular MechanismNatural SciencesCoordination ComplexMolecular BiologyStructure ElucidationCis-1a ⇌Trans-1b IsomerisationMolecular ComplexChemistryCrystallographyCrystal Structure DesignInorganic Compound
Crystalline binuclear chlorotin(II) amides [Sn(µ-Cl)(NR2)]2 have been X-ray characterised as cis-[NR2= [graphic omitted]Me2, 1a] and trans-(R = SiMe3, 2b) conformers [Cl–Sn–Cl′= 78.53(4)1a or 81.33(4)°2b, Sn–Cl–Sn′ 100.91(4)1a or 98.67(4)°2b, <Sn–Cl> 2.74 1a or 2.67 Å2b]; a solution of 1 in toluene undergoes rapid cis⇌trans exchange at ambient temperature, but distinct cis-1a and trans-1b forms coexist below 192 K (119Sn NMR spectroscopy and line-shape analysis) and evidence is presented for an intramolecular mechanism for this exchange.
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