Alkaline earth metal salts, transition metal salts and transition metal

Abstract

There are described novel alkaline earth metal salts, transition metal salts and transition metal complexes of compounds of the formula I ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are, independently of one another, hydrogen, halogen, nitro, cyano, CF.sub.3, C.sub.1 -C.sub.15 alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.2 -C.sub.15 alkenyl, C.sub.1 -C.sub.12 haloalkyl, C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.12 alkylthio, C.sub.6 -C.sub.10 aryl which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl; C.sub.6 -C.sub.10 aryloxy which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl; C.sub.7 -C.sub.12 arylalkyl which is unsubstituted or substituted on the aryl radical by from 1 to 3 C.sub.1 -C.sub.4 alkyl groups; --CO.sub.2 R.sub.6, --COR.sub.6 or ##STR2## where at least one of the radicals R.sub.1 to R.sub.5 is hydrogen, halogen or C.sub.1 -C.sub.15 alkyl, in addition the radicals R.sub.1 and R.sub.2, R2 and R.sub.3, R.sub.3 and R.sub.4 or R.sub.4 and R.sub.5 form, together with the carbon atoms to which they are bound, a benzo or cyclohexenyl ring, R.sub.6 is C.sub.1 -C.sub.20 alkyl, C.sub.2 -C.sub.20 alkyl interrupted by oxygen, sulfur or >N--R.sub.9 ; C.sub.7 -C.sub.12 arylalkyl which is unsubstituted or substituted on the aryl radical by from 1 to 3 C.sub.1 -C.sub.4 alkyl groups, R.sub.7 and R.sub.8 are, independently of one another, hydrogen, C.sub.1 -C.sub.24 alkyl or C.sub.2 -C.sub.24 alkyl interrupted by oxygen, sulfur or >N--R.sub.9, R.sub.9 is hydrogen or C.sub.1 -C.sub.8 alkyl, and n is an integer in the range from 1 to 10 for use, as corrosion inhibitors in coating compositions for protecting metal surfaces.