Crystal structures of the complexes containing macrocyclic cations [ M (cyclam)] <superscript>2+</superscript> ( M = Ni, Zn) and tetra-iodido-cadmate(2-) anion.
In: Acta crystallographica. Section E, Crystallographic communications, Jg. 79 (2023-08-23), Heft Pt 9, S. 821-826
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Zugriff:
The asymmetric units of the isostructural compounds (1,4,8,11-tetra-aza-cyclo-tetra-decane-κ 4 N )nickel(II) tetra-iodido-cadmate(II), [Ni(C 10 H 24 N 4 )][CdI 4 ] ( I ), and tri-iodido-1κ 3 I -μ-iodido-(1,4,8,11-tetra-aza-cyclo-tetra-decane-2κ 4 N )cad-mium(II)zinc(II), [CdZnI 4 (C 10 H 24 N 4 )] ( II ) (C 10 H 24 N 4 = 1,4,8,11-tetra-aza-cyclo-tetra-decane, cyclam, L ), consist of the centrosymmetric macrocyclic cation [ M ( L )] 2+ [ M = Ni II or Zn II ] with the metal ion lying on a twofold screw axis, and the tetra-iodo-cadmate anion [CdI 4 ] 2- located on the mirror plane. In I , the anion acts as an uncoordinated counter-ion while in II it is bound to the Zn II atom via one of the iodide atoms, thus forming an electroneutral heterobimetallic complex [Zn( L )(CdI 4 )]. The Ni II and Zn II ions are coordinated in a square-planar manner by the four secondary N atoms of the macrocyclic ligand L , which adopts the most energetically stable trans -III conformation. The [CdI 4 ] 2- anions in I and II are structurally very similar and represent slightly deformed tetra-hedrons with average Cd-I bond lengths and I-Cd-I angles of ca 2.79 Å and 109.6°, respectively. The supra-molecular organization of the complexes under consideration in the crystals is very similar and is determined by the hydrogen-bonding inter-actions between the secondary amino groups of the ligand L in the [ M ( L )] 2+ cations and iodide atoms of the [CdI 4 ] 2- anion. In particular, the alternating cations and anions form chains running along the b- axis direction that are arranged into di-periodic sheets oriented parallel to the (101) and (01) planes. Because both kinds of sheets are built from the same cations and anions, this feature provides the three-dimensional coherence of the crystals of I and II .
(© Andriichuk et al. 2023.)
Titel: |
Crystal structures of the complexes containing macrocyclic cations [ M (cyclam)] <superscript>2+</superscript> ( M = Ni, Zn) and tetra-iodido-cadmate(2-) anion.
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Autor/in / Beteiligte Person: | Andriichuk, IL ; Shova, S ; Lampeka, YD |
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Zeitschrift: | Acta crystallographica. Section E, Crystallographic communications, Jg. 79 (2023-08-23), Heft Pt 9, S. 821-826 |
Veröffentlichung: | West Sussex : John Wiley & Sons Ltd. [2015]-, 2023 |
Medientyp: | academicJournal |
ISSN: | 2056-9890 (print) |
DOI: | 10.1107/S2056989023007004 |
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