A SELENOCYANATE DERIVATIVE OF AN ALLYL RUTHENIUM(IV) COMPOUND

Treatment of the ruthenium(IV) complex [{Ru(eta(3):eta(3)-C10H16)Cl(mu -Cl)}(2)] (1) with two equivalents of silver(I) selenocyanate gives th e new dimeric compound [{Ru(eta(3):eta(3)-C10H16)Cl(mu-SeCN)}(2)] (2). Although two diastereoisomers are observed in solution an X-ray struc ture determination reveals the C-2 isomer, which is isomorphous with t he previously characterized thiocyanate analogue [{Ru(eta(3):eta(3)-C1 0H16)Cl(mu-SCN)}(2)] (3). Attempts to isolate the C-i isomer of 3 have resulted in the identification of a new polymorph of the C-2 isomer w hich differs from the previously reported structure in the nature of t he intermolecular contacts.