Inorganic Chemistry, Vol.51, No.2, 1170-1179, 2012
2-Aminoisobutyric Acid in Co(II) and Co(II)/Ln(III) Chemistry: Homometallic and Heterometallic Clusters
The synthesis and magnetic properties of 13 new home- and heterometallic Co(II) complexes containing the artificial amino acid 2-amino-isobutyric acid, aibH, are reported: [Co-4(II)(aib)(3)(aibH)(3)(NO3)](NO3)(4)center dot 2.8CH(3)OH center dot 0.2H(2)O (1.2.8CH(3)OH center dot 0.2H(2)O), {Na-2[Co-2(II)(aib)(2)(N-3)(4)(CH3OH)(4)]} (2), [(C6LaIII)-La-II-(aib)(6)(OH)(3)(NO3)(2)(H2O)(4)(CH3CN)(2)]center dot 0.5[La(NO3)(6)]center dot 0.75(ClO4)center dot 1.75-(NO3)center dot 3.2CH(3)CN center dot 5.9H(2)O (3.3.2CH(3)CN center dot 5.9H(2)O), [(Co6PrIII)-Pr-II(aib)(6)-OH)(3)(NO3)(3)(CH3CN)(6)]center dot[Pr(NO3)(5)]center dot 0.41[Pr(NO3)(3)(ClO4)(0.5) (H2O)(1.5)]center dot 0.59[Co-(NO3)(3)(H2O)]center dot 0.2(ClO4)center dot 0.25H(2)O (4.0.2 5H(2)O), [(Co6NdIII)-Nd-II-(aib)(6)(OH)(3)(NO3)(2.8)(CH3OH)(4.7)(H2O)(1.5)]center dot 2.7(ClO4)center dot 0.5(NO3)center dot 2.26CH(3)OH center dot 0.24H(2)O (5.2.26CH(3)OH center dot 0.24H(2)O), [(Co6SmIII)-Sm-II(aib)(6)(OH)(3)(NO3)(3)(CH3CN)(6)], [Sm(NO3)(5)]center dot 0.44[Sm(NO3)(3)(ClO4)(0.5)(H2O)(1.5)]center dot 0.56[Co(NO3)(3)(H2O)]center dot 0.22-(ClO4)center dot 0.3H(2)O (6.0.3H(2)O), [(Co6EuIII)-Eu-II(aib)(6)(OH)(3)(NO3)(3)(CH3OH)(4.87)(H2O)(1.13)]-(ClO4) 2.5(NO3)(0.5)center dot 2.43CH(3)OH center dot 0.92H(2)O (7.2.43CH(3)OH center dot 0.92H(2)O), [(Co6GdIII)-Gd-II(aib)(6)(OH)(3)(NO3)(2.9)(CH3OH)(4.9)(H2O)(1.2)]center dot 2.6(ClO4)center dot 0.5(NO3)center dot 2.58CH(3)OH. 0.47H(2)O (8.2.58CH(3)OH.0.47H(2)O), [(Co6TbIII)-Tb-II(aib)(6)(OH)(3)(NO3)(3)(CH3CN)(6)]center dot[Tb(NO3)(5)]center dot 0.034[Tb(NO3)(3)(ClO4)(0.5)(H2O)(0.5)-(H2O)(0.5)]center dot 0.656[Co(NO3)(3)(H2O)]center dot 0.343(ClO4)center dot 0.3H(2)O (9.0.3H(2)O), [(Co6DyIII)-Dy-II(aib)(6)(OH)(3)(NO3)(2.9)(CH3OH)(4.92)(H2O)(1.18)](ClO4 )(2)center dot 6(NO3)(0.5)center dot 2.5CH(3)OH center dot 0.5H(2)O (10.2.5CH(3)OH center dot 0.5H(2)O), [(Co6HoIII)-Ho-II(aib)(6)(OH)(3)(NO3)(3)(CH3CN)(6)] 0.