| 944833-84-5

• CAS: 944833-84-5
• 化学式: Br₇Re₆S₇*C₂₄H₅₆CeN₈O₈
• 分子量: 2625.91
• InChiKey: CAIGCNCIZHEYFL-UHFFFAOYSA-G

反应信息

• 作为产物：
  描述：

  水合氯化铈 、 N,N-二甲基甲酰胺 、 在 HBr 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 以80%的产率得到
  参考文献：
  名称：

  A morphotropic series of the cluster complexes [Ln(DMF)8][Re6Q7Br7] (Q = S, Se): Synthesis, structure, and thermal transformations

  摘要：

  The reactions of the octahedral anionic complexes [Re(6)Q(7)Br(7)](3-) (Q = S, Se) with lanthanide bromides in DMF were studied. The reactions gave a series of compounds [Ln(DMF)(8)][Re(6)Q(7)Br(7)] (Q = S, Se) containing [Ln(DMF)(8)](3+) complex cations. The compounds were studied by single-crystal and powder X-ray diffraction and thermal analyses. The crystal structures of [Ln(DMF)(8)][Re6S7Br7] with Ln = La (I), Cc (II), Nd (III), Eu (IV), and Lu (V) and [Ln(DMF)(8)][Re6Se7Br7] with Ln = La (VI), Ce (VII), Pr (VIII), and Lu (IX) were determined. It was found that [Ln(DMF)(8)][Re(6)Q(7)Br(7)] (Q = S, Se) can be divided into three structural groups: I, II, and VI (type A), VII (type B), and III-V, VIII, IX (type C). The complex [Pr(DMF)(8)][Re6Se7Br7] was found to crystallize in two polymorphous modifications with type B and C structures. Presumably, the morphotropic transitions in the [Ln(DMF)(8)][Re(6)Q(7)Br(7)] series (Q = S, Se) are mainly related to the change in the configuration of the [Ln(DMF)(8)](3+) cations, resulting in a change in the packing motif of large complex ions in the crystals. The compounds [Ln(DMF)(8)][Re6Se7Br7] decompose according to a stepwise pattern, which suggests an intermediate formation of the complexes [Ln(DMF)(6)][Re6Se7Br7] (this was proved for Ln = Yb, Lu) with subsequent more extensive transformations, which affect also the cluster anion.

  DOI：

  10.1134/s1070328406100046