ChemInform Abstract: Preparation, Structure, and Properties of Pseudotetrahedral, D2d Complexes of Cu(II), Ni(II), Co(II), Cu(I), and Zn(II) with the Geometrically Constraining Bidentate Ligand 2,2′‐Bis(2‐imidazolyl)biphenyl. Examination of Electron Self‐Exchange for the Cu(I)/Cu(II) Pair.