Premium
Flat crown ethers with planar tetracoordinate carbon atoms
Author(s) -
Thirumoorthy Krishnan,
Thimmakondu Venkatesan S.
Publication year - 2021
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.26479
Subject(s) - tetracoordinate , chemistry , molecule , crown ether , density functional theory , uranyl , crystallography , atom (system on chip) , lone pair , ion , computational chemistry , inorganic chemistry , organic chemistry , planar , computer graphics (images) , computer science , embedded system
Novel flat crown ether molecules have been characterized in silico using density functional theory. Monomer units of Si 2 C 3 with a planar tetracoordinate carbon (ptC) atom have been used as building blocks. Alkali (Li + , Na + , K + , Rb + , and Cs + ) and alkaline‐earth (Be 2+ , Mg 2+ , Ca 2+ , Sr 2+ , and Ba 2+ ) metal ions, and uranyl (UO2 2 + ) ion selective complexes have also been theoretically identified. The high symmetry and higher structural rigidity of the host molecules may likely impart higher selectivity in chelation. The potential energy surface of the parent elemental composition, Si 2 C 3 H 2 , has been investigated using coupled‐cluster (CC) approximation. The molecule with a ptC atom within the latter is a low‐lying isomer lying 12.41 kcal mol −1 above the global minimum at the CCSD(T)/cc‐pVTZ level. The crown ether molecules identified here could theoretically be considered the derivatives of the ptC atom isomer. Theoretical binding energies ( Δ E ; 0 K) and thermally corrected Gibbs free energies ( Δ G ; 298.15 K) for crown ether molecules have been computed to gauge their binding affinities.