Ruthenium complex, production method of the complex, and production method of optically active secondary alcohols using the complex as catalyst

A ruthenium complex represented by following general formula (1):

• wherein a solid line represents a single bond, a double line represents a double bond, a dashed line represents a coordinate bond, and a wavy line represents three-center two-electron bond;
• B represents a boron atom, N represents a nitrogen atom, and P represents a phosphorus atom;
• H and HB each represents a hydrogen atom;
• C, CP1, CP2, Ca, CN1, and CN2 each represents a carbon atom;
• Ru represents a divalent ruthenium ion;
• RP represents a group selected from the group consisting of an alkyl group, a cycloalkyl group, a heteroaryl group, and an aryl group which may have a substituent;
• RP1, RP2, RP3, and RP4 each independently represents a hydrogen atom, or a group selected from the group consisting of an alkyl group, an alkenyl group, an alkoxy group, a halogenoalkoxy group, a hydroxy group, and a halogeno group;
• RP1 and RP2 may combine with each other to form a ring with CP1 and CP2, RN1 and RN3 each independently represents a hydrogen atom, or a group selected from the group consisting of an alkyl group, an aryl group, and an aralkyl group;
• RN2, RN4, RN5, and RN6 each independently represents a hydrogen atom, or a group selected from the group consisting of an alkyl group, a halogenoalkyl group, an alkoxy group, and a halogeno group.