Rhenium tricarbonyl core complexes with ligands derived from arylpiperazines. The structures of [Re(CO)3{NC5H4CH2N(H)CH2CH2–Fphenpip}]Br, [Re(CO)3{(NC5H4CH2)2N(CH2)3–CH3OphenpipH}]Br2 and [Re(CO)3{(CH3N2C3H2CH2)(O2CCH2)N(CH2)3–CH3OphenpipH2}]BrCl
作者:Lihui Wei、Sangeeta Ray Banerjee、Murali K Levadala、John Babich、Jon Zubieta
DOI:10.1016/s1387-7003(03)00176-x
日期:2003.8
The reactions of potentially tridentate ligands, derived from N-arylpiperazines, with [NEt4](2)[Rc(CO)(3)Br-3] have been investigated. The compounds [Re(CO)(3)NC5H4CH2N(H) CH2CH2-Fphenpip}]Br (1Br), [Re(CO)(3)][(NC5H4CH2)(2)NCH2CH2CH2-CH3 OphenpipH}]Br-2.2CH2Cl2.H2O (2Br(2).2CH(2)Cl(2).H2O) and [Re(CO)(3)(CH3N2C3H2CH2)(O2CCH2)N(CH2)(3)-CH(3)OphenpipH(2)}]BrCl . 1.5MeOH . H2O (3BrCl . 1.5MeOH . H2O) have been prepared and structurally characterized. The compounds exhibit fac-[Re(CO)(3)N-3] or fac-[Re(CO)(3)N2O] coordination geometry in the cationic molecular units. Both compounds are chemically robust and survive histidine and cysteine challenges with greater than 95% recovery. Crystal data for C21H23BrFN4O3Re (1Br): monoclinic P2(1)/c, a = 11.344(1) Angstrom, b = 14.433(1) Angstrom, c = 13.730(1) Angstrom, beta = 103.092(2)degrees, V = 2189.5(2) Angstrom(3), Z = 4; C31H41Br2Cl4N5O5Re (2Br(2) . 2CH(2)Cl(2) . H2O): monoclinic P2(1)/c, a = 30.015(1) Angstrom, b = 8.9324(4) Angstrom, c = 14.7361 (6) Angstrom, beta = 103.195.(1)degrees, V = 3846.5(3) Angstrom(3), Z = 4; C25.5H39BrClN5O8.5Re (3BrCl . 1.5MeOH . H2O): triclinic P (1) over bar, a = 11.818(2) Angstrom, b = 13.292(2) Angstrom, c = 14.517(2) Angstrom, alpha = 63.915(2)degrees, beta = 66.373(2)degrees, gamma = 67.416(2)degrees, V = 1815.6(4) Angstrom(3), Z = 2. (C) 2003 Elsevier Science B.V. All rights reserved.