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Inducing ring distortions in unsubstituted metallophthalocyanines using axial N-heterocyclic carbenes.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 4/21/2024, Vol. 53 Issue 15, p6537-6546, 10p
- Publication Year :
- 2024
-
Abstract
- A series of metallophthalocyanine (PcM) complexes with axial N-heterocyclic carbene ligands (NHC; 1,3-diisopropylimidazol-2-ylidene (DIP) and 1,3-dimethylbenzimidazol-2-ylidene (DMB)) were prepared and structurally characterized. PcCo<superscript>II</superscript>(DIP), PcZn<superscript>II</superscript>(DIP), and PcZn<superscript>II</superscript>(DMB) are five-coordinate complexes with mild dome-type Pc-ring distortions, while PcFe<superscript>II</superscript>(DIP)<subscript>2</subscript> is six-coordinate and has a very large ruffle-type ring-distortion with respect to typical PcM(L)<subscript>2</subscript> systems. The distortion is induced by the highly steric axial DIP ligands. The distortions were quantified and classified by their bond lengths and torsion angles, and according to the normal-coordinate structural decomposition (NSD) analysis. Upon ligation of the NHC, the insoluble PcM materials were solublized in common organic solvents, with typical UV-visible Q-band maxima observable between 658 and 677 nm; the increased solubility is rationalized in terms of the reduced solid-state aggregation of the complexes, attributable to the axial ligation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 53
- Issue :
- 15
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 176611122
- Full Text :
- https://doi.org/10.1039/d4dt00528g