名称:
Synthesis and crystal structure of complexes of manganese(II), cobalt(II), and nickel(II) isothiocyanates with ɛ-caprolactam
摘要:
The possibility of E >-caprolactam (CPL) to coordinate to manganese(II), cobalt(II), and nickel(II) rhodanides has been investigated. New complexes trans-[M(CPL)(4)(NCS)(2)], where M = Mn (I), Co (II), and Ni (III), have been synthesized. The complexes have been studied by chemical analysis and IR spectroscopy. According to X-ray diffraction, complexes are isostructural to each other and crystallize in monoclinic space group P2(1)/c, Z = 2. For I: a = 6.9457(2) , b = 17.7751(6) 0A, c = 12.8999(4) 0A, beta = 104.2670(10)A degrees, V = 1543.51(8) (3), rho(calc) = 1.342 g/cm(3), R (1) = 0.0426. For II: a = 6.8925(2) , b = 17.8189(8) , c = 12.7278(6) , beta = 104.421(2)A degrees, V = 1513.93(11) (3), rho(calc) = 1.377 g/cm(3), R (1) = 0.0280. For III: a = 6.7804(2) , b = 18.4631(4) , c = 12.4841(3) , beta = 105.2950(10)A degrees, V = 1507.49(7) (3), rho(calc) = 1.382 g/cm(3), R (1) = 0.0273. Structures I-III are molecular; the metal atom in each of them coordinates four CPL molecules and two NCS groups via oxygen and nitrogen atoms, respectively.