pi donor ligands are also known as what {Ans: pi bases, they have filled pi orbitals about the M-L axis and are lower in energy than sigma orbitals}quantum number N {Ans: principle quantum number, defines energy and size of orbital}Primitive unit cell {Ans: contains only one lattice point}Relative energies of MOs {Ans: 4sigma>2pi>3sigma>1pi>2sigma>1sigma}ambidentate ligand {Ans: one which has multiple donor atoms, but only binds through one, typically has a negative charge, resonance stabilized}describe hyperfine structure {Ans: it is a multiplet structure due to coupling of electron spin to magnetic nuclei. A nucleus with spin I will split the EPR line into 2I+1 lines of the same intensity}