首页> 外文期刊>Chemistry: A European journal >Variation of heterometallic structural motifs based on [W(CN)(8)](3-) anions and Mn-II ions as a function of synthetic conditions
【24h】

Variation of heterometallic structural motifs based on [W(CN)(8)](3-) anions and Mn-II ions as a function of synthetic conditions

机译:基于[W(CN)(8)](3-)阴离子和Mn-II离子的异金属结构基序随合成条件的变化

获取原文
获取原文并翻译 | 示例
           

摘要

Reactions of [W(CN)(8)](3-/4-) anions with complexes of Mn2+ ion with tridentate organic ligand 2,4,6-tris(2-pyridyl)-1,3,5-triazine (tptz) lead to a series of heterobimetallic complexes. The crystal structures of these compounds are derived from the same basic structural fragment, namely a W2Mn2, square constructed of alternating cyanide-bridged W and Mn ions. In [Mn-II(tptz)(OAc)(H2O)(2)](2){[Mn-II(tptz)(MeOH)(1.58)(H2O)(0.42)](2)[W-v(CN)(8)](2)}center dot 5MeOH center dot 9.85H(2)O (3), isolated molecular squares are co-crystallized with mononuclear cationic Mn-II complexes. The structure of {[Mn-II(tptz)(MeOH)(2)- [W-IV(CN)(8)]center dot 2MeOH}(infinity) (4) is based on an infinite chain of vertex-sharing squares, while {[Mn-2(II)(tptz)(2)(MeOH)(3)-(OAc)][W-v(CN)(8)]center dot 3.5MeOH center dot 0.25H(2)O}infinity (5) and {[Mn-2(II)(tptz)(2)(MeOH)(3)Wv(CN)(8)][Mn-II(tptz)(MeOH)W-v(CN)(8)] center dot 2H(2)O center dot MeOH}(8) (7) are derived from such an infinite chain by removing one of the W-C N-Mn linkages in each of the squares. The decanuclear cluster [Mn-6(II)(tptz)(6)(MeOH)(4)(DMF)(2)W-4(V)- (CN)(32)]center dot 8.2H(2)O center dot 2.3MeOH (6) is a truncated version of structure 4 and consists of three vertex-sharing W2Mn2 squares. The structure of [Mn-II(tptz)(MeOH)(NO3)](2)[Mn-II(tptz)(MeOH) (DMF)](2)[W-v(CN)(8)](2)center dot 6MeOH (8) consists of a hexanuclear cluster, in which the central W2Mn2 square is extended by two Mn side-arms attached via CN- ligands to the W corners of the square. The magnetic behavior of these heterobimetallic complexes (except for 4) is dominated by antiferromagnetic coupling between Mn-II and W-v ions mediated by cyanide bridges. Compounds 3, 6, and 8 exhibit high spin ground states of S=4, 13, and 9, respectively, while 5 and 7 exhibit behavior typical of a ferrimagnetic chain with alternating spin centers. Complex 4 contains diamagnetic W-IV centers but holds promise as a potential photomagnetic solid.
机译:[W(CN)(8)](3- / 4-)阴离子与Mn2 +离子与三齿有机配体2,4,6-三(2-吡啶基)-1,3,5-三嗪(tptz )导致一系列异双金属配合物。这些化合物的晶体结构源自相同的基本结构片段,即W2Mn2,由氰化物桥连的W和Mn离子交替构成的正方形。在[Mn-II(tptz)(OAc)(H2O)(2)](2){[Mn-II(tptz)(MeOH)(1.58)(H2O)(0.42)](2)[Wv(CN) (8)](2)}中心点5MeOH中心点9.85H(2)O(3),将分离出的分子方块与单核阳离子Mn-II配合物共结晶。 {[Mn-II(tptz)(MeOH)(2)-[W-IV(CN)(8)]中心点2MeOH}(无穷大)(4)的结构基于顶点共享正方形的无限链,而{[Mn-2(II)(tptz)(2)(MeOH)(3)-(OAc)] [Wv(CN)(8)]中心点3.5MeOH中心点0.25H(2)O}无穷大(5)和{[Mn-2(II)(tptz)(2)(MeOH)(3)Wv(CN)(8)] [Mn-II(tptz)(MeOH)Wv(CN)(8)]中心点2H(2)O中心点MeOH}(8)(7)通过除去每个正方形中的WC N-Mn键之一从这种无限链衍生而来。 can核簇[Mn-6(II)(tptz)(6)(MeOH)(4)(DMF)(2)W-4(V)-(CN)(32)]中心点8.2H(2)O中心点2.3MeOH(6)是结构4的截短形式,由三个顶点共享的W2Mn2正方形组成。 [Mn-II(tptz)(MeOH)(NO3)](2)[Mn-II(tptz)(MeOH)(DMF)](2)[Wv(CN)(8)](2)中心的结构点6MeOH(8)由六核簇组成,其中中心的W2Mn2方形由两个Mn侧臂延伸,这些侧臂通过CN配体连接到该方形的W角。这些异双金属配合物(除4外)的磁行为主要由氰化物桥介导的Mn-II和W-v离子之间的反铁磁耦合决定。化合物3、6和8分别显示出S = 4、13和9的高自旋基态,而化合物5和7则具有自旋中心交替的亚铁磁链的典型行为。配合物4包含反磁性W-IV中心,但有望成为潜在的光磁性固体。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号