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The reaction of phenyl 2-pyridyl ketoxime(PhPyCNOH)with Cu(NO_3)_2·3H_2O has led to a triangular complex Cu_3(OH)(PhPyCNO)_3(NO_3)·NO_3·H_2O 1 containing the[Cu_3(μ_2-OH)]~(5+) core and possessing the very rare inverse 9-metallacrown-3 motif created by the bridging oximate groups.Crystallographic data for 1:C_(36_H_(30)N_8O_(11)Cu_3,M_r=941.30,monoclinic,space group C2/c,a =18.815(9),b=33.888(15),c=14.307(7)(?),β=118.945(6)°,V=7983(6)(?)~3,Z=8,D_c=1.566 g/cm~3,n=1.652 mm~(-1),F(000)= 3816,R= 0.0644 and wR= 0.1393 for 3468 observed reflections(I>2σ(I)).Preliminary variable-temperature magnetic susceptibility studies reveal an antiferroma-gnetically -coupled system showing antisymmetric exchange.
The reaction of phenyl 2-pyridyl ketoxime (PhPyCNOH) with Cu (NO_3) _2 · 3H_2O has led to a triangular complex Cu_3 (OH) (PhPyCNO) _3 (NO_3) · NO_3 · H_2O 1 containing the [Cu_3 (5+) core and possessing the very rare inverse 9-metallacrown-3 motif created by the bridging oximate groups. Crystallographic data for 1: C_ (36_H_ (30) N_8O_ (11) Cu_3, M_r = 941.30, monoclinic, space group C2 / c, a = 18.815 (9), b = 33.888 (15), c = 14.307 (7),? = 118.945 (6) °, V = 7983 = 8, D_c = 1.566 g / cm ~ 3, n = 1.652 mm -1, F (000) = 3816, R = 0.0644 and wR = 0.1393 for 3468 observed reflections (I> 2σ (I) variable-temperature magnetic susceptibility studies reveal an antiferroma-gnetically-coupled system showing antisymmetric exchange.