The present invention relates to a compound of the formula: ##STR1## wherein (a) A is independently selected from --SR.sup.1, --NR.sup.1 R.sup.2, --PR.sup.1 R.sup.2, --Si,R.sup.1 R.sup.2 R.sup.3, or --SnR.sup.1 R.sup.2 R.sup.3,R.sup.1, R.sup.2 and R.sup.3 are each independently selected from alkyl, cycloalkyl, alkylcycloalkyl, arylalkyl having from 1 to 20 carbon atoms or aryl, substituted aryl, or where R.sup.2 and R.sup.3 together form a heterocycle group, having from 4 to 20 carbon atoms, andn is an integer from 1 to 5;(b) Y is selected from a direct bond or --CR.sup.4 R.sup.5 --, wherein R.sup.4 and R.sup.5 are each independently selected from hydrogen, or alkyl group having 1 to 20 carbon atoms or R.sup.4 and R.sup.5 together form a cycloalkyl group having 4 to 20 carbon atoms;(c) Z is aryl or substituted aryl; and(d) X is halogen, sulfonate, carboxylate, phosphate, carbonate, sulfate, or MD.sub.m wherein M is boron, phosphorous, arsenic, antimony or silicon, D is fluorine, chlorine, bromine or iodine and m is 2, 3 or 4. These compounds are useful as synergistic corrosion inhibitors for metals. These compounds are also useful as bacteriostats, antifungal agents and as deicing agents as surfactants.