Trimethylphosphine, p(ch3)3, can act as a ligand by donating the lone pair of electrons on the phosphorus atom. if trimethylphosphine is added to a solution of nickel(ii) chloride in acetone, a blue compound that has a molecular mass of approximately 270 g and contains 21.5% ni, 26.0% cl, and 52.5% p(ch3)3 can be isolated. this blue compound does not have any isomeric forms. what are the geometry and molecular formula of the blue compound?