Transition metall complexes of amidinourea and related ligands. II. Tetrahedral Cobalt(II) Complexes with O‐propyl‐1‐amidinoureas

Abstract

AbstractNew cobalt(II) complexes of the formula [Co(AA)2]X2 (where AA = O‐n‐propyl‐1‐amidinourea and O‐iso‐propylamidinourea, X = Cl or Br) have been synthesized and characterized by elemental analysis, magnetic susceptibility measurements and electronic spectra. The complexes are all violet in colour and posses magnetic moments in the range 4.4–4.5 BM. Electronic spectral and magnetic data identify the complexes as tetrahedral ones. Tetrahedral complexes can only be prepared with O‐alkyl‐1‐amidinoureas containing higher alkyl groups. The electronic spectral data indicate the strong field character of these ligands.