Nickel (II) thiocyanate reacts with ammonia at - 35.4oC yielding solvated products Ni (NCS)2. NH3 (n = 7.8) with respective ammonia vapour pressures of 40 and 120 mm Hg at this temerpature. The van't Hoff's method for the determinationof dissociation enthalpies gave values of 30.8 and 29.4 kJ mol-1 for the seven - and eight - ammoniates respectively.


DONNATI M S MOSHA ,