Cationic compounds

A cationic compound of the formula ##STR84## wherein Z is a radical of the formula ##STR85## one of the two B symbols either has the meaning of Z or is a radical of the formula ##STR86## and the other of the two B symbols is an identical or different radical of the formula ##STR87## R independently of one another are each hydrogen, nitro, cyano, halogen, C.sub.1 -C.sub.4 alkyl, or C.sub.1 C.sub.4 alkyl substituted by C.sub.1 -C.sub.4 alkoxy, cyano, halogen, CONH.sub.2, CONH--C.sub.1 -C.sub.4 alkyl, CON(C.sub.1 -C.sub.4 -alkyl).sub.2 or phenyl which is unsubstituted or substituted by halogen, alkyl and/or alkoxy, or are alkanoylamino, benzoylamino, C.sub.1 -C.sub.4 alkoxy or C.sub.1 -C.sub.4 alkoxy substituted by phenyl,

• R.sub.1 independently of one another are each C.sub.3 -C.sub.4 alkenyl, C.sub.1 -C.sub.4 alkyl, or C.sub.1 -C.sub.4 alkyl substituted by C.sub.1 -C.sub.4 alkoxy, cyano, halogen, CONH.sub.2 or phenyl which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl or halogen,
• R.sub.2 is phenyl, naphthyl, thiazolyl, imidazolyl, pyrazolyl, triazolyl, piperazinyl, pyridyl, piperidyl or morpholyl, each of which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkyl, hydroxyl, halogen, nitro, or cyano,
• R.sub.3 is hydrogen, C.sub.1 -C.sub.6 alkyl or C.sub.2 -C.sub.6 alkenyl, or C.sub.1 -C.sub.6 alkyl or C.sub.2 -C.sub.6 alkenyl substituted by hydroxyl, halogen, nitro, or cyano,
• X is sulfur or ##STR88## with R.sub.1 being as defined above or both R.sub.1 together with the carbon to which they are attached form a cyclohexyl or cyclopentyl ring,
• Y is --NH--, --NR.sub.1 --, --O-- or --S--,
• A is the direct bond, --NH--C.sub.1 -C.sub.4 alkylene-, --O--C.sub.1 -C.sub.4 alkylene-, C.sub.1 -C.sub.4 alkylene, phenylene, --O-phenylene- or --NH-phenylene-, n is 1 or 2 and
• An is an anion.