REACTIVITY OF [(1,2,3,4-TETRAHYDRONAPHTHALENE)MN(CO)(3)]PF6 - MOLECULAR-STRUCTURE OF [(1,2,3,4-TETRAHYDRONAPHTHALENE)MN(CO)(2)(C(O)ME)]

[(1,2,3,4-Tetrahydronaphthalene)Mn(CO)(3)]PF6 (1) was synthesized in 78% yield, starting from Mn(CO)(5)Br, AlCl3 and tetralin in refluxing cyclohexane. The reactivity of 1 with nucleophiles has been studied. When 1 was reacted with nucleophiles such as NaBH3CN (NaBD4), PhMgBr, NaP(O)(OMe)(2), and LiCH2CN, alpha-position adducts were always obtained. However, when the nucleophile was MeMgBr, alpha-position adduct and acylcompound (4) were obtained in the ratio of 5.2:1. Compound 4 crystallizes in the orthorhombic system, space group P2(1)2(1)2(1) with cell parameters a = 7.141(6), b = 11.741(4), c = 15.158(3) Angstrom, and Z = 4. Least-squares refinement of the structure led to a R (wR(2),) factor of 0.0357 (0.0791) for 902 unique reflections of I > 2 sigma(I) and for 163 variables.