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Supramolecular assembly of oxalatomolybdates controlled by the hydrogen bonding potential of Co(iii)-ammine cations†
CrystEngComm ( IF 2.6 ) Pub Date : 2018-03-09 00:00:00 , DOI: 10.1039/c7ce02205k
Marina Cindrić 1, 2, 3, 4, 5 , Vladimir Stilinović 1, 2, 3, 4, 5 , Mirta Rubčić 1, 2, 3, 4, 5 , Glorija Medak 1, 2, 3, 4, 5 , Dubravka Šišak Jung 1, 6, 7, 8 , Višnja Vrdoljak 1, 2, 3, 4, 5
Affiliation  

A systematic study of the possibility of controlling the formation of oxalatomolybdate anions by the choice of a counterion and adjustment of pH was presented. Using four CoIII(ammine) macrocations ([Co(NH3)6]3+, [Co(NO2)(NH3)5]2+, [Co(en)3]3+ and [Co(ox)(en)2]+) in acidic aqueous solutions, ten crystalline solids were obtained. They were found to contain a total of six different oxalatomolybdate species, three of which, a cyclic tetramer, [Mo2O4(μ-O)2(ox)2]28−, a linear tetramer [Mo4O8(μ-O)3(ox)4(H2O)2]6− and a polymer, [Mo4O11(ox)4(H2O)]n6n have not been reported to date. The oxalatomolybdate species found in solids mostly do correspond with the predominant species in solution at the pH of the solution from which they were obtained. Condensation of those species can be correlated with the hydrogen bonding ability of the used macrocation, a complex cation of Co(III).

中文翻译:

草酸钼酸酯的超分子组装受Co(iii)-胺类阳离子氢键势的控制

提出了通过选择抗衡离子和调节pH值来控制草酰钼酸盐阴离子形成的可能性的系统研究。使用四个Co III(氨基)大阳离子([Co(NH 36 ] 3+,[Co(NO 2)(NH 35 ] 2 +,[Co(en)3 ] 3+和[Co(ox) (en)2 ] +)在酸性水溶液中,获得十种结晶固体。发现它们总共包含六种不同的草酰钼酸盐,其中三种是环状四聚体[Mo 2 O 4(μ-O)2(ox)2 ] 2 8−,线性四聚体[Mo 4 O 8(μ-O)3(ox)4(H 2 O)2 ] 6−和聚合物[Mo 4 O 11(ox)4( H 2 O)] n 6 n迄今尚未报告。在固体中发现的草酰草酸盐种类确实与溶液中的主要种类相对应,该溶液是从中获得它们的溶液的pH值。这些物质的缩合可能与所用的大阳离子(Co(III)。
更新日期:2018-03-09
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