The compound Pt(C2H4)(P(C6H5)3)2 reacts smoothly in THF with the activated cyclopropanes 1,1,2,2-tetracyano-3-phenylcyclopropane or 1-carboethoxy-1,2,2-tricyano-trans-3-phenylcyclopropane to form the corresponding -Pt(PC6-145)3)2 insertion product by breaking the bond possessing the largest number of cyano substituents. These metallocyclobutanes have been characterized by x-ray diffraction methods. The compound Pt[C3H(C6H5)(CN)4][P(C6H5)3]2 crystallizes with two molecules in space group C22-P21 of the monoclinic system in a cell of dimensions a=11.272 (2), b=17.209 (2), c=11.598 (2) Å,β=112.57 (1)Δ. A total of 210 variables has been refined from 4132 observations by conventional least-squares methods to an R index on Fo of 0.029. The compound Pt[C3H(C6H5)(CN)3(COOC2H5)] [P(C6H5)3]2.x:CHCL3 (x≈0.8) crystallizes with four formula units in space group C2h,5-P21/c of the monoclinic system in a cell of dimensions a=12.844 (2), b=12.498 (3), c=30.406 (4) Å, β=90.67 (1)Δ. A total of 276 variables has been refined from 4235 observations to an R index of 0.056. Comparisons are made between the structural parameters of these complexes and those of other platinum-containing metallocyclobutanes.
ASJC Scopus subject areas
- Colloid and Surface Chemistry