New metal chelate cpds., used in organic ferromagnets - prepd. from aromatic tri:carboxylic acid, aromatic or hetero-aromatic amine and metal salt, giving lightweight magnet

摘要

New metal chelates (I) are claimed, which are obtd. by reacting aromatic tricarboxylic acids or derivs. with (hetero)aromatic amines of formula (II), where A = a 5-6 membered aromatic ring, opt. contg. 1-2 hetero-atoms; R1 = -COOH, -XNH2, -XNHR2 or a gp. of the formulae (III), (IV), (V), (VI), (VII), (VIII); where x = CO, CS, SO, SO2, C= NR3, -P(=O)-NH2 or -P(=O)-NHR3; R2-3 = 1-12C alkyl, 6-20C aryl or 7-20C arylalkyl; Y = CH2, O, S or NR2; and then complex formation by adding gp. IB, VIA, VIIA or VIII metal salts. Organic ferromagnets obtd. by converting (I) to nitrosyl cpds. are also claimed. USE/ADVANTAGE - (I) are used in the prodn. of organic ferromagnets (claimed). The ferromagnets are esp. useful in microelectronics. The ferromagnets are lightweight and easily processed.