SYNTHESIS, STRUCTURE AND SOLUTION CONFORMATION OF SOME (ETA(5)-INDENYL)(I-2-N)(R)(L(N))CO-III](N-1-DONOR) COMPLEXES( (N=1,2R=PERFLUOROALKYLL=P)

Reaction of (eta(5)-indenyl)(I)(R)(CO)Co (R = C3F7, C6F13) with P-dono r ligands yields a series of mono- and disubstituted products [(eta(5) -indenyl)(I-2-n)(R)(L(n))Co]((n-1)+) (n = 1, 2, L = PMe(3); n = 1, L = PPhMe(2), PPh(2)Me, PPh(2)(OMe), PPh(3)). Product distribution is hig hly ligand dependent and no disubstituted product forms for bulky P-do nor ligands. Solution NMR data (H-1, C-13, F-19) for the racemic, Co-c hiral, monosubstituted derivatives support a slightly distorted eta(5) -indenyl piano stool structure with a preferred conformation which pla ces the perfluoroalkyl group trans to the indenyl 6-ring. The structur e of [(C9H7)(C3F7)(PMe(3))(2)Co]I . 0.5 CH2Cl2 (5) was determined by s ingle crystal X-ray diffraction. Compound 5 crystallizes in the monocl inic space group P2(1)/n with a = 16.760(5) Angstrom, b = 10.614(7) An gstrom, c = 28.595(5) Angstrom, beta = 96.61(2)degrees, V = 5053(3) An gstrom(3), Z = 4 and was refined to R = 0.040 and R(W) = 0.036 based o n 4097 observations with I > 3.00 sigma(I).