Add time:08/30/2019         Source:sciencedirect.com

The synthesis and X-ray crystal structures of eight transition metal complexes of 12-crown-4 are reported. These are: [Mn(H2O)6][Mn(12-crown-4)2]2(ClO4)6·6H2O (1), [Ni(H2O)6](ClO4)2·12-crown-4 (2), [Zn(12-crown-4)2]2[Zn(H2O)6](ClO4)6·(12-crown-4)2·(H2O)2 (3), [Mn(12-crown-4)2][MnCl4]·H2O (4), [Co(12-crown-4)Cl(H2O)]2(ClO4)·H2O (5), [Zn(12-crown-4)2][ZnCl3(H2O)]2 (6), [Cu(Br)2(12-crown-4)] (7) and [Cd(12-crown-4)(NO3)2] (8). Depending on the identiy of the counter anion, the structures fall into three groups: (1) hydrogen bonded polymers; (2) sandwich M(12-crown-4)2 cations alternating with transition metal containing anions; and (3) neutral molecular species incorporating 12-crown-4.

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