The 13O NMR of lanthanide a-alaninate coordination compounds have been studied by XL-200 NMR spectrometer under weakly acidic condition. The chem. shifts obtained are separated into coordination compound formation shift, contact shift and pseudo-contact shift by using the method of "independent structure ". According to the contribution of different shifts, it is revealed that "tetrad phenomenon" and "gadolinium break effect" of lanthanides also appear in its magnetic properties. The structures of coordination compounds are simulated by computer based on the pseudocontact shift. Some interesting results are obtained and discussed.

Key words: METHYLACETIC ACID P, MOLECULAR STRUCTURE, C13 NMR SPECTROMETRY, COMPUTERIZED SIMULATION, CHEMICAL SHIFT, METAL COMPLEX, LANTHANIDE SERIES METALS, AMINOCARBOXYLIC ACID