摘要:
A rotational potential has been quantified by correlating the rotational barrier of the NH, groups in the series Ni(NH3)(6) I2-xBrx (0 < x < 2), with the measured changes in interatomic distances in the crystal. It transpires that the interaction with the anion is slight and that the effective exponent for intermolecular NH3-NH3 interaction is close to six.