Bidentates selenium-oxygen ligands

Some O-Se ligands are also known. A -, A--diet lr y 1 - A"- benzoy 1 se 1 eno ureato zinc has been characterized where the zinc is bidentately coordinated to the two ligands through the oxygen and selenium atoms, forming a distorted tetrahedral geometry.859... 

Some complexes which satisfy this definition are dealt with elsewhere, however. Those with X or Y as the Group V donors P, As or Sb are dealt with in Chapter 14 of this volume. Those with X or Y = Hg are described in Chapter 11 and the Group IV donors Si, Ge, Sn and Pb are included in Chapter 12.2, With very few exceptions this means that the relevant X,Y combinations are pairs derived from nitrogen, oxygen, sulfur or selenium donor groups. However, some specific examples of these combinations also occur elsewhere in this work. Amino acids (generally N—O bidentates) are covered in Chapter 20.2, Schiff base ligands (N—O or N—S) in Chapter 20.1, and several S—O... 

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