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The molecular ion [FeClsH20]1 2' in the host (NH4)2[InClsH20] has been studied by electron resonance at 300 and 77°K. oriented single-crystal rotation patterns were used to extend epr powder techniques to d5 systems. Large g shifts and quadratic zero-field splitting parameters (D, E) were observed along with rather small quartic splitting parameters {a, F, K). The large rhombic parameter E was used to infer -bonding interactions by the water ligand.

1971, p 187 ff. Although implicit in previous structural data,2'-*s the nature of the water-anion unit in lithium hydroxide monohydrate has not been previously described. It has been shown2'33 that while hydrogen bonding from coordinated water affects the force constants, and thus the frequencies, of 0-H vibrations, such bonding need not be considered in setting up the symmetry model for the coordinated water.

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