Deordorising compositions and deodorising products containing same

A method for destroying malodorous molecules using a deodorant composition, wherein said deodorant composition comprises at least one compound of the family of the a-acetylenic ketones corresponding to general formula 1

• R—(CO)k-C≡C-(A)-(C≡C)m-(CO)n-R1 (1)
• in which
• R and R1 can represent, independently or simultaneously, a radical selected from the group consisting of
• an alkyl chain comprising from 1 to 9, linear or branched, substituted or unsubstituted,
• a cycloalkane comprising from 3 to 8, substituted or unsubstituted;
• a furan ring, saturated or unsaturated, substituted or unsubstituted;
• a pyran ring, saturated or unsaturated, substituted or unsubstituted;
• an aromatic ring comprising from 6 to 8 carbon atoms, substituted or unsubstituted;
• and
• a hydrogen atom,
• A represents a group selected from the group consisting of —(CH2)x with x representing an integer with a value from 0 to 6, (CO)l with l representing an integer with a value of 0 or 1, or also a —(CH2)y-O—(CH2)z-chain formation with y and z representing, simultaneously or independently, an integer with a value from 0 to 6, wherein x+y does not exceed the value of 6;
• k, m and n are, simultaneously or independently, an integer with a value of 0 or 1, wherein k and n do not simultaneously have a value of 0 if l is equal to 0;
• with the exception of 2-methyl-4-nonyn-3-one of formula C4H9—C≡C—CO—CH(CH3)2 in the deodorant composition.