REACTIONS BETWEEN Cu(II) HALIDE COMPLEXES OF 2,2’-DIPYRIDYLAMINE AND NITROPHENOLATES. X-RAY DIFFRACTION STRUCTURE OF THE {bis(2,2’-DIPYRIDYLAMINE)di(p-NITROPHENOLATO)di(mu-METHOXO) DICOPPER(II)], [Cu(DIPYAM)(PNP)(mu-OCH3)]2, A DIMERIC COMPLEX CONTAINING AXIAL PHENOXO LIGANDS IN SQUARE-PYRAMIDAL ARRANGEMENTS