Transition metal complexes of dibenzoyl-L-tartaric acid (db-L-tarH(2)) and L-tartaric acid (L-tarH(2)); X-ray crystal structure of {[Cu(L-tar)(phen)]center dot 6H(2)O}(n) (phen equals 1,10-phenanthroline)

Dibenzoyl-L-tartaric acid (db-L-tarH(2)) reacts with [Cu-2(mu-O2CCH3)(4)(H2O)(2)] to form the tartrate complex [Cu(L-tar)] (1) (L-tarH(2) = L-tartaric acid). 1 reacts with 2,2'-bipyridine (bipy) and 1,10-phenanthroline (phen) yielding [Cu(L-tar)(bipy)]. 6H(2)O (2) and [Cu(L-tar)(phen)]. 4H(2)O (3), respectively. A crystal of composition {[Cu(L)-tar(phen)]. 6H(2)O}(n) (4) was taken directy from the original mother liquor of 3. The X-ray crystal structure of the polymeric complex 4 shows each copper(II) ion to be six-coordinate, being chelated by a phenanthroline ligand and also chelated by a carboxylate oxygen atom and a hydroxyl oxygen atom from one end of a tartrate group. A carboxylate oxygen atom and a hydroxyl oxygen atom from one end of a symmetry-related tartrate ligand also chelates to the metal. Dibenzoy-L-tartaric acid also reacts with [Mo-2(mu-O2CCH3)(4)], [Mo-2(CH3CN)(8)][BF4](4), {[Ru-2(mu-O2CCH3Cl]}(n) and Na-4[Rh-2(mu-CO3)(4)]. 2.5H(2)O to give {[Mo-2(db-L-tar)(2)]. 5H(2)O}(n) (5), [Mo-2(db-L-tar)(CH3CN)(4)][BF4](2) . 7H(2)O (6), {[Ru-2(db-L-tar)(2.5)]. 2H(2)O}(n) (7) and {[Rh-2(db-L-tar)(2)(H2O)(2)]. H2O}(n), (8), respectively. (C) 1997 Elsevier Science Ltd.