Abstract The solvate complexes that can be obtained by either dissolving metal iodides in N,N-dimethylformamide (DMF) or by synthesising them in DMF have the general composition [M(DMF) x ]I y . DMF shows to behave as simple monodentate ligand with low sterical impact, so that x in the composition follows the radius of M y+. We present here the crystal structures of the alkaline earth and lanthanoid metal iodide complexes [Mg(DMF)6]I2, [Ca(DMF)6]I2, [Sr(DMF)7]I2, [Ba(DMF)8]I2, [La(DMF)9]I3, [Ln(DMF)8]I3 (isotypic series for Ln = Nd, Sm, Eu, Dy, Gd, Er, Yb and Lu) and for the tris-triiodide complex salt [Sc(DMF)6](I3)3. Their different crystal structure types can be compared on the basis of the packing topologies of the nearly spherical cationic entities which show simple sphere packing motifs.

中文翻译：

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碱土金属和镧系金属碘化物与 N,N-二甲基甲酰胺的溶剂合物的合成和晶体结构

摘要 将金属碘化物溶解在 N,N-二甲基甲酰胺 (DMF) 中或在 DMF 中合成得到的溶剂合物的一般组成为 [M(DMF) x ]I y 。DMF 表现为具有低空间影响的简单单齿配体，因此组合物中的 x 遵循 M y+ 的半径。我们在此介绍了碱土金属和镧系元素金属碘化物络合物 [Mg(DMF)6]I2、[Ca(DMF)6]I2、[Sr(DMF)7]I2、[Ba(DMF)8]I2 的晶体结构, [La(DMF)9]I3, [Ln(DMF)8]I3（Ln = Nd、Sm、Eu、Dy、Gd、Er、Yb 和 Lu 的同型系列）和三三碘化物络盐 [Sc (DMF)6](I3)3。它们不同的晶体结构类型可以根据近球形阳离子实体的堆积拓扑进行比较，这些拓扑结构显示出简单的球形堆积基序。