Heterocyclic derivatives of [4-(piperazin-1-yl-phenyloxymethyl)-1,3-dioxolan-2-ylmethyl]-1H-imidazol es and 1H-1,2,4-triazoles

A composition for combatting the growth of a microorganism selected from the group consisting of fungus and bacterium comprising an inert carrier material and as an active ingredient an effective antifungal or antibacterial amount of a compound selected from the group consisting of an azole derivative having the formula:

• ##STR40## and the pharmaceutically acceptable addition salts and stereochemically isomeric forms thereof, wherein:
• Q is a member selected from the group consisting of CH and N;
• Ar is a member selected from the group consisting of phenyl, thienyl, halothienyl and substituted phenyl, said substituted phenyl having from 1 to 3 substituents each independently selected from the group consisting of halo, lower alkyl, lower alkyloxy and trifluoromethyl;
• and
• the radical Y is an optionally substituted mono- or binuclear nitrogen-containing heteroaromatic radical selected from the group consisting of:
• a radical of formula ##STR41## wherein R.sup.1 is selected from the group consisting of hydrogen, lower alkylthio, aryllower alkylthio and arylthio and R.sup.2 and R.sup.3 are each independently selected from the group consisting of hydrogen, lower alkyl, aryl and aryllower alkyl;
• a radical of formula ##STR42## wherein each of R.sup.4 and R.sup.5 are independently selected from the group consisting of hydrogen, lower alkyl, aryl and aryllower alkyl;
• a radical of formula ##STR43## wherein L is a member selected from the group consisting of S and N-R.sup.18, said R.sup.18 being selected from the group consisting of hydrogen, lower alkyl and aryllower alkyl, and R.sup.16 and R.sup.17 are each independently selected from the group consisting of hydrogen, lower alkyl, nitro and aryllower alkyl, or R.sup.16 and R.sup.17, when taken together, represent a radical of the formula --CH.dbd.CH--CH.dbd.CH--.