Methods of synthesis of organometallic compounds to produce puratronic (6N) material have been tested and selected from the point of view of their up-scaling potential. Purification of those compounds by complex salts decomposition at elevated temperatures or by vacuum transport has been proposed. Reasons of transportation of oxygen containing compounds to the reaction chamber, what is harmful to the epitaxial process, have been determined and their removal from organometallics by crystallization proposed.