(R,R)-[Ethylene-1,2-bis(η5-4,5,6,7-tetrahydro-1-indenyl)]titanium (R)-1,1′-Bi-2,2′-naphtholate

(R,R,R) [143063-72-3] C40H36O2Ti (MW 596.64) InChI = 1S/C20H14O2.C20H24.Ti/c21-17-11-9-13-5-1-3-7-15(13)19(17)20-16-8-4-2-6-14(16)10-12-18(20)22;1-3-7-19-15(5-1)9-11-17(19)13-14-18-12-10-16-6-2-4-8-20(16)18;/h1-12,21-22H;9-12H,1-8,13-14H2;/q;;+2/p-2 InChIKey = ZVPRKHQZEULVLC-UHFFFAOYSA-L (S,S,S) [83417-93-0] InChI = 1S/C20H14O2.C20H24.Ti/c21-17-11-9-13-5-1-3-7-15(13)19(17)20-16-8-4-2-6-14(16)10-12-18(20)22;1-3-7-19-15(5-1)9-11-17(19)13-14-18-12-10-16-6-2-4-8-20(16)18;/h1-12,21-22H;9-12H,1-8,13-14H2;/q;;+2/p-2 InChIKey = ZVPRKHQZEULVLC-UHFFFAOYSA-L (precursor to a catalyst for the asymmetric reduction of unsaturated organic molecules1) Physical Data: mp 274.5–277 °C (dec); [α]578, −3700° (c = 0.45 mg cm−3 in CHCl3). Solubility: sol THF, benzene, toluene; slightly sol ether; very slightly sol hexane. Preparative Methods: originally prepared and characterized by Brintzinger et al. from the corresponding dichloride derivative and (R)-1,1′-Bi-2,2′-naphthol.2 The dichloride is synthesized by reacting the dilithium salt of 1,2-bis(3-indenyl)ethane with Titanium(IV) Chloride followed by hydrogenation over Platinum(IV) Oxide.2 Since the original report, two improved procedures for its preparation have appeared.3, 1b Handling, Storage, and Precautions: the complex is air and moisture stable and can be stored indefinitely.