Crystal and molecular structures of two addition products of hexafluorobut-2-yne with palladium(II)β-diketonate rings: cis-bis[1,2-bis-(trifluoromethyl)-3-acetyl-4-oxopent-1-enyl-O,C1]palladium(II) and ab-[1,2-bis(trifluoromethyl)-3-acetyl-4-oxopent-1-enyl-O,C1]-cd-{2-[(dimetnylamino)methyl]phenyl-C1,N}palladium(II)

Abstract

The crystal structures of the title compounds C18H14F12O2Pd (1) and C18H19F6NO2Pd (2) have been determined. Crystals of (1) are monoclinic, space group P21/n with a= 9.512 ± 0.007, b= 23.294 ± 0.01 3, c= 11.301 ± 0.009 A, β= 114.9 ± 0.2° crystals of (2) are monoclinic, space group P21/c, with a= 8.789 ± 0.007, b= 13.186 ± 0.010, c= 17.237 ± 0.014 A, β= 102.4 ± 0.2°. The structures were solved from counter intensity data by heavy-atom techniques and refined by block-diagonal least-squares methods to R 0.057 [4 302 reflections, (1)] and 0.034 [3 748 reflections, (2)]. The molecular geometries are described and related to the fact that both adducts are formed by 1,4-addition of hexafluorobut-2-yne to palladium(II)–acetylacetonate rings. Mean bond lengths are Pd–C 1.998, Pd–O 2.130, Pd–N 2.115, Pd–C(Ph) 1.988, and CC 1.339 A.