“…The inactive form of this compound, however, has been shown by D. P. Mellor (119) to be diamagnetic; hence the Ni(II) atom is square coordinated. In contrast with this conclusion, H. S. French and G. Corbett (65) have concluded that the Ni(II) atom is tetrahedrally coordinated in bis(d-formylcamphor) nickel(II), which compound is paramagnetic. Clearly there is some anomaly here if the mag- netic moment can be accepted as a reliable criterion of stereochemistry.…”