| Abstract: | A heptanuclear double-bowl-like cluster Co7(mmp)6(OH)6]2·(ClO4)2·12H2O (1·12H2O, Hmmp is 2-methoxy-6-methyliminomethyl-phenol) has been synthesized through the microwave-assisted reaction of Co(ClO4)2·6H2O with 2-hydroxy-3-methoxy-benzaldehyde (Hhmb) and methylamine in mixed solvent (acetonitrile : distilled water = 9 : 1) for 29 min. 1·12H2O was heated until 180 °C and it formed a non-water complex Co7(mmp)6(OH)6]2·(ClO4)2 (1). The core of 1·12H2O can be described as a double bowl, while the dodecanuclear water cluster stands on the bowl. Magnetic investigations show that 1·12H2O and 1 display ferromagnetic interaction between cobalt ions. Moreover, 1 shows single molecular magnet behavior under 2 K. Magnetic studies indicate that hydrogen bond plays a vital role in transferring magnetic exchange effects. |
