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The novel (E,E )-dioxime, 5,6:17,18-dibenzo-11,12-(4 0 -nitrobenzo)-2,3-bis(hydroxyimino)-7,16-dithia-10,13-dioxa-1,4-diazacyclooctadecane) (H 2 L), has been synthesized from reaction of (E,E )-dichloroglyoxime (1) with 2,3:14,15-dibenzo 8,9-(4 0 -nitrobenzo)-4,13-dithia-7,10-dioxa-1,16-diazahegzadecane (2). The mononuclear Co(III) complex (4) of this dioxime was prepared by oxidation of the cobalt (II) complex. The BF þ 2 -capped Co(III) complex (5) was synthesized by using a precursor Co(III) complex and boron trifluoride dietherate. The heterotrinuclear complexes (6) and (7) were prepared by reaction of (5) with NiCl 2 Á 6H 2 O and CdCl 2 Á H 2 O, respectively. In addition, the homotrinuclear Cu(II) complex (8), has also been prepared by the reaction of this dioxime with CuCl 2 Á H 2 O. The structures of the dioxime and its complexes were identified by using elemental analysis, 1 H-and 13 C-NMR, IR, and mass spectral data.

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