METAL PHENOXYALKANOIC ACID INTERACTIONS .38. STRUCTURES OF THE POLYMERIC COPPER(II) COMPLEXES OF (2-ACETYLPHENOXY)ACETIC ACID - MU-[(2-ACETULPHENOXY)ACETATO-O,O']-BIS[COPPER(II)] AND S-MU-[(2-ACETYLPHENOXY)ACETO-O,O')-BIS[COPPER(II)]

Two copper(II) complexes with the ortho-substituted phenoxyacetic acid , (2-acetylphenoxy)acetic acid (RCO(2)H), have been prepared and their crystal structures determined by X-ray diffraction. Both are polymers based on tetracarboxylato-bridged dimer units of the copper acetate h ydrate type. Complex 1, catena-tetrakis-mu-[(2-acetylphenoxy)acetato-O , O']-bis[copper(II)], [Cu-2(RCO(2))(2)](n), is extended into a polyme r via the axial dimer sites through the acetyl carbonyl oxygens of adj acent units [Cu-O, 2.171(2) Angstrom, Cu-Cu, 2.6401(6). Angstrom]. The second complex 2. an adduct with 2-aminopyrimidine (2-AP), ine-N,N')- tetrakis-mu-[(2-acetylphenoxy)acetato-O, O']-bis [copper(II)], [Cu-2(R CO(2))(4)(2-AP)](n), forms a zig-zag chain polymer through the heteron itrogens of the 2-AP ring [Cu-N, 2.191, 2.217(2) Angstrom; Cu-Cu, 2.67 75(7) Angstrom]. These chains are stabilized by the presence of hydrog en bonding between the 2-amino group of 2-AP and the carboxyl oxygens of adjacent dimers.