An efficient synthesis of polyynyl and polyynediyl complexes of ruthenium(II) †

Abstract

The fluoride-induced desilylation of trimethylsilyl-substituted alkynes and polyynes and subsequent reactions with RuCl(PPh₃)₂Cp have been used to synthesize complexes containing unsaturated chains containing up to six carbons. Reactions with Co₂(CO)₈ or tetracyanoethene have been further used to characterise the products. Structural confirmation of RuX(PPh₃)₂Cp [X = C[triple bond, length half m-dash]CC₆H₄C[triple bond, length half m-dash]CSiMe₃ 2, C[triple bond, length half m-dash]CC[triple bond, length half m-dash]CPh 4, C[triple bond, length half m-dash]CC₂Ph{Co₂(CO)₆} 8, C[triple bond, length half m-dash]CC₂H{Co₂(µ-dppm)(CO)₄} 9, C[triple bond, length half m-dash]CC{[double bond, length half m-dash]C(CN)₂}CPh[double bond, length half m-dash]C(CN)₂ 10 or C[triple bond, length half m-dash]CC{[double bond, length half m-dash]C(CN)₂}C{[double bond, length half m-dash]C(CN)₂}C[triple bond, length half m-dash]CPh 11] and {Ru(PPh₃)₂Cp}₂(µ-C_n ) [n = 4 (6) or 6 (7)] is reported.

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