What is described are a compound of the formula (I) Wherein U is —N(R2)OR3 or —N+(O−)═C(RE)RZ); n is 0 or 1; X—Y is —CH═CH— or —CH2—CH2—; R1 is C1-C12alkyl, C3-C8cycloalkyl or C2-C12alkenyl; R2 and R3 are, for example; independently from each other, —Q, —C(═O)—Z—Q or —CN; RZ and RE are, independently from each other, —Q, —C(═O)—Z—Q or —CN; or RZ and RE together are a three- to seven membered alkylene or alkenylene bridge, which is unsubstituted or mono- to tri-substituted; Z is a bond, O or —NR4—; Q is H, C1-C12alkyl, C2-C12alkenyl, C2-C12alkynyl, C3-C12-Cycloalkyl, C5-C12-cycloalkenyl, aryl, or heterocyclyl, which are unsubstituted or mono- to pentasubstituted; R4 is for example H, C1-C8alkyl, hydroxy-C1-C8alkyl, C3-C8cycloalkyl or C2-C8alkenyl; or, if appropriate, an E/Z isomer, E/Z isomer mixture and/or tautomer thereof; a process for preparing these compounds, their isomers and tautomers and the use of these compounds, their isomers and tautomers; pesticidal compositions whose active compound is selected from these compounds and their tautomers; intermediates for the preparation of the said compounds of the formula (I), methods for the preparation of the compounds of the formula (I), and a method for controlling pests using these compositions.