STEPWISE SUBSTITUTION-REACTIONS OF THE (ETA(5)-C5ME5)RE(CO)(2)I-2 COMPLEX - ARYL-IODO AND ARYLMETHYL DERIVATIVES TRANS-(ETA(5)-C5ME5)RE(CO)(2)(AR)X, X=I AND ME - X-RAY STRUCTURE OF TRANS-(ETA(5)-C5ME)RE(CO)(2)(PH)I

The diiodo complex cis-(eta 5-C5Me5)Re(CO)(2)I-2 undergoes monosubstit ution in reaction with arylcopper (ArCu) to produce the corresponding aryl-iodo complexes trans-(eta(5)-C5Me5)Re(CO)(2)(Ar)I, Ar = phenyl an d tolyl. These complexes have been fully characterized by using a comb ination of elemental analyses and IR, H-1 and C-13 NMR spectroscopy; a dditionally trans-(eta(5)-C5Me5)Re(CO)(2)(Ph>I was studied by X-ray cr ystallography. This complex crystallizes in the monoclinic space group P2(1)/m with a = 8.091(2), b = 17.471(4), c = 12.995(3)Angstrom, beta = 93.97(2)degrees, V = 1832.6(7)Angstrom(3) and D-calc = 2.107gcm(-3) for Z = 4. The refined structure gave R = 2.74% and wR = 2.98% for 28 58 observed reflections. Further reaction of the aryl-iodo complexes w ith MeLi yields the corresponding aryl-methyl derivatives trans-(eta(5 )-C5Me5)Re(CO)(2)(Ar)Me. The full spectroscopic characterization of th ese complexes is also described in this paper.