LnL(NO3)3.nH2O (Ln = La, Ce, Pr, n = 0, L = 2,6-diacetylpyridinebis(benzoylhydrazone); Ln = Ho, Er, Yb, n = 2) were synthesized and characterized by elemental analyses, IR spectra and elec. conductance. The crystal structure of the Yb complex was determine by x-ray diffraction. It crystd. in the monoclinic space group P21/c, a 9.570(1), b 23.367(4), c 13.853(2) ? b 109.15(1)? Z = 4, R = 0.027. The coordination no. of Yb3+ is 9.

Key words: CRYSTAL STRUCTURE DETERMINATION, PYRIDINE P, NITRATE, SINGLE CRYSTALS, YTTERBIUM COMPLEX, TRANSITION METAL COMPLEX, ACYL COMPOUND, PHENYLHYDRAZINE P, HYDRAZIDE P