Citation: Wo. Koch et al., FIRST STRUCTURAL CHARACTERIZATION OF AN 8-COORDINATE COBALT(II) COMPLEX CONTAINING 5-MEMBERED CHELATE RINGS - EVIDENCE FOR D-ORBITAL SIGMA-STABILIZATION ENERGY FAVORING 8-COORDINATION OVER 6-COORDINATION AT COBALT(II) IONS, Chemical communications, (22), 1997, pp. 2237-2238