Ionic liquid containing hydroxamate and N-alkyl sulfamate ions

An ionic liquid comprising a cation and an anion selected from hydroxamate and N-alkyl sulfamate anions, wherein the hydroxamate anion has the following general formula:

• wherein R is selected from hydrogen, linear or branched, saturated or unsaturated, aliphatic or alicyclic alkyl groups having 1 to 30 carbon atoms;
• oligoethylene glycol monoalkyl ethers of the form (R′—(O—CH2—CH2)p—O—CH2—CH2), wherein p represents a number of from 1 to 30 and R′ represents a linear or branched, saturated or unsaturated, aliphatic or alicyclic alkyl group having 1 to 30 carbon atoms;
• alkenyl;
• cycloalkyl;
• heteroaryl-C1-6-alkyl groups having from 3 to 8 carbon atoms in the aryl residue and at least one heteroatom selected from N, O, P, and S which may be substituted with at least one C1-6 alkyl group and/or halogen atoms;
• and aryl-C1-6-alkyl groups having from 5 to 12 carbon atoms in the aryl residue which may be optionally substituted with at least one C1-6 alkyl group and/or halogen atom;
• and
• the N-alkyl sulfamate anion has the following general formula:
• wherein R is selected from linear or branched, saturated or unsaturated, aliphatic or alicyclic alkyl groups having 1 to 30 carbon atoms;
• oligoethylene glycol monoalkyl ethers of the form (R′—(O—CH2—CH2)p—O—CH2—CH2), wherein p represents a number of from 1 to 30 and R′ represents a linear or branched, saturated or unsaturated, aliphatic or alicyclic alkyl group having 1 to 30 carbon atoms;
• alkenyl;
• heteroaryl-C1-6-alkyl groups having from 3 to 8 carbon atoms in the aryl residue and at least one heteroatom selected from N, O, P, and S which may be substituted with at least one C1-6 alkyl group and/or halogen atoms;
• aryl-C1-6-alkyl groups having from 5 to 12 carbon atoms in the aryl residue which may be optionally substituted with at least one C1-6 alkyl group and/or halogen atom.