Mixture containing a monophosphite ligand and the use thereof for catalysis of a hydroformylation reaction

A mixture, comprising:

• at least one of the two compounds of the structures Ia and Ib:
• Ib
• wherein
• R1, R2, R3, R4, R5, R6, R7, R8 are each independently selected from the group consisting of:
• —H, —(C1-C12)-alkyl, —O—(C1-C12)-alkyl, —O—(C6-C20)-aryl, —(C6-C20)-aryl, halogen, COO—(C1-C12)-alkyl, CONH—(C1-C12)-alkyl, —(C6-C20)-aryl-CON[(C1-C12)-alkyl]2, —CO—(C1-C12)-alkyl, —CO—(C6-C20)-aryl, —COOH, —OH, —SO3H, —SO3Na, —NO2, —CN, —NH2, and —N[(C1-C12)-alkyl]2;
• X and Y are each independently selected from the group consisting of:
• —(C1-C12)-alkyl, —(C6-C20)-aryl, —(C6-C2O-aryl-(C1-C12)-alkyl, —(C6-C20)-aryl-O—(C1-C12)-alkyl, —(C1-C12)-alkyl-(C6-C20)-aryl, —(C6-C20)-aryl-COO—(C1-C12)-alkyl, —(C6-C20)-aryl-CONH—(C1-C12)-alkyl, —(C6-C20)-aryl-CON[(C1-C12)-alkyl]2, —(C4-C20)-heteroaryl, —(C4-C20)-heteroaryl-(C1-C12)-alkyl, and —(C5-C8)-cycloalkyl-(C4-C20)-aryl-CO—(C6-C20)-aryl,
• Z is selected from the group consisting of:
• —(C1-C12)-alkyl-, —(C6-C20)-aryl-, —(C6-C20)-aryl-(C1-C12)-alkyl-, —(C1-C12)-alkyl-(C6-C2O-aryl-, —(C4-C20)-heteroaryl-, —(C6-C20)-aryl-CO—(C6-C20)-aryl-, and —(C6-C20)-aryl-(C6-C20)-aryl-;
• Q is selected from the group consisting of:
• —(C1-C18)-alkyl-, —(C1-C18)-haloalkyl-, and —NH—(C1-C18)-alkyl,
• wherein the alkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, aryl and heteroaryl groups are optionally substituted, and
• a compound of the structure IIa:
• wherein
• R20, R30, R40 are each independently selected from the group consisting of:
• —(C1-C12)-alkyl, —(C6-C20)-aryl, and —(C3-C12)-cycloalkyl,
• two R20 and R30, or R20 and R40, or R30 and R40 radicals are optionally bridged to one another, and optionally have a —(C6-C20)-aryl-(C6-C20)-aryl unit,
• wherein the alkyl, cycloalkyl and aryl groups mentioned are optionally substituted.