A NEW SCHIFF-BASE COMPLEX - (N-[3-(2-AMINOETHYLAMINO)PROPYL]SALICYLIDENE-AMINATO-O,N,N',N'')BROMOZINC(II)

[Zn(satnen)Br], where satnen = H2N(CH2)(2)NH(CH2)3-N=CHC6H4O-, is the first example of a complex containing a tetradentate Schiff base derived from 1,6-diamino-3-azahexane. The Zn atom is bonded to five atoms (Br, O and three N atoms) and its coordination polyhedron can be described either as a distorted trigonal bipyramid (the Br atom being situated in the equatorial plane) or as a distorted tetragonal pyramid (with the Br atom at the apex). The Zn-Br bond is unusually long [2.4812(7) Angstrom]. The bonding distances within the phenyl ring vary between 1.34(2) and 1.42(1) Angstrom. The longer distances involve those C atoms which are connected either to O or to the C(H)=N-fragment. There are two intermolecular N-H ... X, X = Br, O, hydrogen bonds; the X = O bond is extremely weak.