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)(NO(3))](NO(3))(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)(CH(3)OH)(4)]} (2), [C(6)(II)La(III)-(aib)(6)(OH)(3)(NO(3))(2)(H(2)O)(4)(CH(3)CN)(2)]center dot 0.5[La(NO(3))(6)]center dot 0.75(ClO(4))center dot 1.75-(NO(3))center dot 3.2CH(3)CN center dot 5.9H(2)O (3.3.2CH(3)CN center dot 5.9H(2)O), [Co(6)(II)Pr(III)(aib)(6)-OH)(3)(NO(3))(3)(CH(3)CN)(6)]center dot[Pr(NO(3))(5)]center dot 0.41[Pr(NO(3))(3)(ClO(4))(0.5) (H(2)O)(1.5)]center dot 0.59[Co-(NO(3))(3)(H(2)O)]center dot 0.2(ClO(4))center dot 0.25H(2)O (4.0.2 5H(2)O), [Co(6)(II)Nd(III)-(aib)(6)(OH)(3)(NO(3))(2.8)(CH(3)OH)(4.7)(H(2)O)(1.5)]center dot 2.7(ClO(4))center dot 0.5(NO(3))center dot 2.26CH(3)OH center dot 0.24H(2)O (5.2.26CH(3)OH center dot 0.24H(2)O), [Co(6)(II)Sm(III)(aib)(6)(OH)(3)(NO(3))(3)(CH(3)CN)(6)], [Sm(NO(3))(5)]center dot 0.44[Sm(NO(3))(3)(ClO(4))(0.5)(H(2)O)(1.5)]center dot 0.56[Co(NO(3))(3)(H(2)O)]center dot 0.22-(ClO(4))center dot 0.3H(2)O (6.0.3H(2)O), [Co(6)(II)Eu(III)(aib)(6)(OH)(3)(NO(3))(3)(CH(3)OH)(4.87)(H(2)O)(1.13)]-(ClO(4))2.5(NO(3))(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), [Co(6)(II)Gd(III)(aib)(6)(OH)(3)(NO(3))(2.9)(CH(3)OH)(4.9)(H(2)O)(1.2)]center dot 2.6(ClO(4))center dot 0.5(NO(3))center dot 2.58CH(3)OH. 0.47H(2)O (8.2.58CH(3)OH.0.47H(2)O), [Co(6)(II)Tb(III)(aib)(6)(OH)(3)(NO(3))(3)(CH(3)CN)(6)]center dot[Tb(NO(3))(5)]center dot 0.034[Tb(NO(3))(3)(ClO(4))(0.5)(H(2)O)(0.5)-(H(2)O)(0.5)]center dot 0.656[Co(NO(3))(3)(H(2)O)]center dot 0.343(ClO(4))center dot 0.3H(2)O (9.0.3H(2)O), [Co(6)(II)Dy(III)(aib)(6)(OH)(3)(NO(3))(2.9)(CH(3)OH)(4.92)(H(2)O)(1.18)](ClO(4))(2)center dot 6(NO(3))(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), [Co(6)(II)Ho(III)(aib)(6)(OH)(3)(NO(3))(3)(CH(3)CN)(6)] 0.