Ligand mediated structural diversity and role of different weak interactions in molecular self-assembly of a series of copper(II)-sodium(I) Schiff-base heterometallic complexes

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• 作者：Debabrata Biswas ; Partha Pratim Chakrabarty ; S ; ip Saha ; Atish Dipankar Jana ; Dieter Schollmeyer ; Santiago Garc¨ªa-Gr ; a
• 关键词：Heterometallic ; Schiff bases ; Weak interactions ; Supramolecular assembly ; Tape motif ; Self-organization
• 刊名：Inorganica Chimica Acta
• 出版年：2013
• 出版时间：1 November, 2013
• 年：2013
• 卷：408
• 期：Complete
• 页码：172-180
• 全文大小：2167 K

文摘

We report three new Cu-Na heterometallic complexes namely [Cu(L1^2?)Na(NO₃)(CH₃OH)] (1), [Cu(L2^2?)Na(NO₃) (CH₃OH)] (2) and [Cu Na (L3^3?)]_n (3) where the topology of the synthon is directly governed by the ¦Ð-¦Ð interaction involving the Cu-Schiff base chelate rings. The crystal structure analysis also reveals how the systematic variation in the ligand framework influences the supramolecular assembly and the mutual cooperation of different ¦Ð-forces and the hydrogen bonding forces in the supramolecular assembly. The ¦Ð-forces are more important than the hydrogen bonding forces in such compounds is evident from the supramolecular assembly of compound 3. Most interesting revelation of the studies are the presence of relatively uncommon ¦Ð-forces such as chelate ring?chelate ring and metal-¦Ð interactions in the supramolecular architecture of the complexes. The analysis of the supramolecular assembly of the complexes 1-3 reveals that metal-chelate rings play prominent role in the organization of the molecular complexes and should seriously consider along with other ¦Ð-stacking forces.