Reactions of TiCl4 or Ti(O-i-Pr)Cl-3 with 2,4-pentanedione. The molecular structures of TiCl3(acac)(THF) and Ti(O-i-Pr)Cl-2(acac)(THF)

A series of titanium(IV) acetylacetonate (acac) complexes, Ti(acac)Cl-3 (TH F) (2), [Ti(acac)Cl-2(THF)](2) (mu -O) (3), [Ti(O-i-Pr)Cl-3(acac)](-)(HNEt3 +) (5), and Ti(O-i-Pr)Cl-2 (acac)(THF) (6), were prepared from reactions of TiCl4 or Ti(O-i-Pr)Cl-3 with 2,4-pentanedione (Hacac) in CH2Cl2 or THF wit h or without the presence of NEt3. The x-ray structural analyses were carri ed out on complexes 2 and 6. Complex 2 crystallizes in the monoclinic P2(1) /n space group with a = 8.664(1) Angstrom, b = 11.859(1) Angstrom, c = 14.3 20(1) Angstrom, beta = 103.94(1)degrees, R = 0.0571, R-w = 0.0620, and Gof = 1.10. Complex 6 crystallizes also in the monoclinic P2(1)/n space group w ith a = 9.074(2) Angstrom, b = 11.499(2) Angstrom, c = 16.549(4) Angstrom, beta = 101.96(2)degrees, R = 0.0492, R-w = 0.0671, and Gof = 1.49. Based on the solid state structures of complexes 2 and 6, the relative bonding orde r of O--i-Pr > Cl- > acad > THF is established.