Arene–osmium chemistry: synthesis via osmium atoms of [Os(η6-C6H6)(η4-C6H6)],[{OS(η6-C6H3Me3-1,3,5)}2(µ-H)2{µ-CH(C6H3Me2-3,5)}], [{OS(η6-C6H3Me3-1,3,5)}2(µ-CHC6H3Me2-3,5)], and [{OS(η6-C6H6)}3{µ3-(CH2)3CH}(µ-H)3]. X-Ray crystal structure of [{Os(η6-C6H3Me3-1,3,5)}2(µ-CHC6H3Me2-3,5)]

Abstract

The new compounds [Os(η⁶-C₆H₆)(η⁴-C₆H₆)], [Os(η⁶-C₆H₆)(η⁵-C₆H₇)]BF₄, [Os(η⁵-C₆H₇)₂], [{Os(η⁶-C₆H₃Me₃-1,3,5)}₂(µ-H)₂{µ-CH(C₆H₃Me₂-3,5)}], [{Os(η⁶-C₆H₃Me₃-1,3,5)}₂{µ-CH(C₆H₃Me₂-3,5)}], and [{Os(η⁶-C₆H₆)}₃{µ₃-(CH₂)₃CH}(µ-H)₃] are described. The crystal structure of [{Os(η⁶-C₆H₃Me₃-1,3,5)}₂{µ-CH(C₆H₃Me₂-3,5)}] has been determined. The intramolecular ring-exchange process of [Os(η⁶-C₆H₆)(η⁴-C₆H₆)] has been analysed by two-dimensional (¹H–¹H) chemical exchange and magnetisation transfer experiments. The formation of [{Os(η⁶-C₆H₆)}₃{µ₃-(CH₂)₃CH}(µ-H)₃] from osmium atoms, benzene, and 2-methylpropane represents a remarkable alkane activation reaction.