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Symmetry Decrease between Self‐Assembled Circular TiO 4 N 2 ‐Based Helicates
Author(s) -
Khalil Georges,
Barloy Laurent,
Kyritsakas Nathalie,
Kauffmann Brice,
Chaumont Alain,
Henry Marc,
Mobian Pierre
Publication year - 2020
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202000531
Subject(s) - chemistry , crystallography , self assembly , ligand (biochemistry) , solid state , symmetry (geometry) , crystal structure , stereochemistry , organic chemistry , geometry , biochemistry , receptor , mathematics
A multicomponent self‐assembly reaction involving a bis‐biphenolato ligand (LH 4 ), a 2,2'‐bipyrimidine chelate substituted by two (anthryl)vinyl moieties (bAnt) and Ti(O i Pr) 4 was investigated. An assembly {[Ti 3 (L) 3 (bAnt) 3 ]}, composed of three homochiral TiO 4 N 2 nodes, was characterized as being the thermodynamically‐end product. The crystal structure of this circular helicate highlighted an absence of symmetry for this compact compound. DOSY 1 H NMR indicated that the nuclearity observed in the solid state for [Ti 3 (L) 3 (bAnt) 3 ] was maintained in solution. An intermediate formulated as [Ti 4 (L) 4 (bAnt) 4 ] was isolated. The structural analysis revealed that [Ti 4 (L) 4 (bAnt) 4 ] was a symmetrical circular hollow helicate composed of four homochiral metallovertices. This study, supported by DFT calculation, brought some evidences on the sequences and the reasons leading to the symmetry decrease for this self‐assembly process.