Pyrrolo[3,4-c]pyrroles

A pyrrolo[3,4-c]pyrrole of formula ##STR104## wherein A and B are each independently of the other a group of formula ##STR105## wherein R.sub.1 and R.sub.2 are each independently of the other hydrogen, halogen, C.sub.1 -C.sub.18 alkyl, C.sub.1 -C.sub.18 alkoxy, C.sub.1 -C.sub.18 alkylmercapto, C.sub.1 -C.sub.18 alkylamino, --CN, --NO.sub.2,-phenyl, trifluoromethyl, C.sub.5 -C.sub.6 cycloalkyl, --C.dbd.N--(C.sub.1 -C.sub.18 alkyl), ##STR106## imidazolyl, pyrrazolyl, triazolyl, piperazinyl, pyrrolyl, oxazolyl, benzoxazolyl, benzothiazolyl, benzimidazolyl, morpholinyl, piperidinyl or pyrrolidinyl,

• G is --CH.sub.2 --, --CH(CH.sub.3)--, --C(CH.sub.3).sub.2 --, --CH.dbd.N--, --N.dbd.N--, --O--, --S--, --SO--, --SO.sub.2 -- or --NR.sub.7 --,
• R.sub.3 and R.sub.4 are each independently of the other hydrogen, halogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.18 alkoxy or --CN, R.sub.5 and R.sub.6 are each independently of the other hydrogen, halogen or C.sub.1 -C.sub.6 alkyl and R.sub.7 is hydrogen or C.sub.1 -C.sub.6 alkyl,
• D and E are each independently of the other a group of formula ##STR107## and D may also be hydrogen, and in formulae II, III and IV m, n and p are each independently of one another 0 or 1,
• X is C.sub.1 -C.sub.14 alkylene or C.sub.2 -C.sub.8 alkenylene,
• Y is a group --V--(CH.sub.2).sub.q--,
• Z is a group --V--(CH.sub.2).sub.r --,
• V is C.sub.3 -C.sub.6 cycloalkylene,
• q is an integer from 1 to 6, and
• r is an integer from 0 to 6,
• R.sub.8 and R.sub.9 are each independently of the other hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, CN, NO.sub.2, unsubstituted phenyl or phenoxy or phenyl or phenoxy which are substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or halogen,
• Q is hydrogen, CN, Si(R.sub.8).sub.3, a group C(R.sub.12)(R.sub.13)(R.sub.14), wherein R.sub.12, R.sub.13 and R.sub.14 are halogen, a group ##STR108## wherein R.sub.8 and R.sub.9 are as defined above, a group SO.sub.2 R.sub.15 or SR.sub.15, wherein R.sub.15 is C.sub.1 -C.sub.4 alkyl, a group CH(R.sub.16).sub.2, wherein R.sub.16 is unsubstituted phenyl or phenyl which is substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or halogen, or a group of formula ##STR109## R.sub.10 and R.sub.11 are each independently of the other hydrogen, C.sub.1 -C.sub.18 alkyl a group ##STR110## wherein X, Y, R.sub.8, R.sub.9, m and n are as defined above, or R.sub.10 and R.sub.11, together with the linking nitrogen atom, form a pyrrolidinyl, piperidinyl or morpholinyl radical, with the proviso that, if D and/or E are a group of formula III, Q is hydrogen and n is 0, m must be 1 and X a C.sub.2 -C.sub.14 alkylene or C.sub.2 -C.sub.8 alkenylene group which is branched at the carbon atom attached to the oxygen atom.