The invention relates to aza-sila compounds of Formula (I), useful as insect repellants. wherein, ‘A’ is selected from the group consisting of branched or unbranched (C1-C12) alkyl, branched or unbranched (C1-C12) alkynyl and substituted or unsubstituted 4 to 6 membered acyclic saturated or unsaturated compounds, wherein the substituents are selected from the group consisting of halogen, hydrogen, (C1-C6) alkyl, aryl, arylalkyl and heterocyclic or ‘A’ is independently selected from the group consisting of the following moiety: Formula (II) wherein, X and Y are identical or different and independently selected from the group consisting of —C—, —N, —O, and —S where R1, R2, R3, and R4 are identical or different and are independently selected from the group consisting of hydrogen, halogen, linear or branched (C1-C6) alkyl, aryl, arylalkyl, hydroxyl, and heterocyclic and wherein, the halogen is selected from the group consisting of —Cl, —I, —Br, and —F. The invention further discloses a process for the preparation of the compounds of Formula (I).
