1,4-Addition of hexafluorobut-2-yne to co-ordinated cyclo-octa-1,5-diene: crystal and molecular structure of (acetylacetonato)aqua{7–8-η-7,8-bis(trifluoromethyl)bicyclo[4.2.2]dec-7-ene-2,5-diyl}rhodium(III)

Abstract

Crystals of the title compound (1) are monoclinic, space group C2/c, with a= 8.84(1), b= 19.34(2), c= 22.61(2)Å, β= 102.8(5)°, Z= 8. The structure was refined by least-squares analysis of counter intensities to R 0.092 for 1 591 reflexions. Mean bond lengths are: Rh–C 2.05, Rh–C(olefinic) 2.09, Rh–O(trans to C) 2.05, Rh–O(trans to olefinic bond) 2.18, and Rh–OH₂ 2.32Å. Possible intermediates to the formation of the adduct are discussed.