Silvis, A. R.; Hauer, K. M.; Dickie, D. A.; Machan, C. W. CCDC 2283925: Experimental Crystal Structure Determination. CSD Communication 2026.
Publications
2026
Obi, A. D.; Dickie, D. A.; Gilliard Jr., R. J. CCDC 2190047: Experimental Crystal Structure Determination. CSD Communication 2026.
Obi, A. D.; Dickie, D. A.; Gilliard Jr., R. J. CCDC 2190031: Experimental Crystal Structure Determination. CSD Communication 2026.
Obi, A. D.; Dickie, D. A.; Gilliard Jr., R. J. CCDC 2190030: Experimental Crystal Structure Determination. CSD Communication 2026.
Taylor, C. C.; Frey, N. C.; Dickie, D. A.; Gilliard Jr., R. J. CCDC 2441185: Experimental Crystal Structure Determination. CSD Communication 2026.
Taylor, C. C.; Frey, N. C.; Dickie, D. A.; Gilliard Jr., R. J. CCDC 2441184: Experimental Crystal Structure Determination. CSD Communication 2026.
Taylor, C. C.; Frey, N. C.; Dickie, D. A.; Gilliard Jr., R. J. CCDC 2441183: Experimental Crystal Structure Determination. CSD Communication 2026.
Taylor, C. C.; Frey, N. C.; Dickie, D. A.; Gilliard Jr., R. J. CCDC 2441182: Experimental Crystal Structure Determination. CSD Communication 2026.
Dickie, D. A.; Turnbull, M. M. Octahedral Cu(II) perchlorate complexes of n-methyl-2-pyridones. Journal of Coordination Chemistry 2026, 79, 1546–1566.
Reaction of hexaaquacopper(II) perchlorate with n-methyl-2-hydroxypyridine generated a family of [(n-methyl-2-pyridone)xCu](ClO4)2 complexes: [(3-methyl-2-pyridone)6Cu](ClO4)2 (1), [(4-methyl-2-pyridone)6Cu](ClO4)2 (2), [(5-methyl-2-pyridone)6Cu](ClO4)2 (3), [(5-methyl-2-pyridone)4(H2O)2Cu](ClO4)2.2(5-methyl-2-pyridone) (4), and [(6-methyl-2-pyridone)4Cu(ClO4)2] (5). Variable temperature X-ray structural analysis reveals a mixture of elongation and compression Jahn-Teller or Jahn-Teller-like distortions. Compound 1 undergoes a temperature dependent phase transition from a Jahn-Teller elongated structure to a Jahn-Teller compressed structure.
Bo, Y.; Gensel, C.; Dickie, D. A.; Wu, Q.; Qin, Y. Synthesis and Characterization of Conjugated [3]Cumulenes and Substitution-Dependent Photo-Switchability. Journal of Materials Chemistry C 2026, 14, 15174–15181.
We report the synthesis and characterization of a series of di- [3]cumulene molecules containing the two [3]cumulene segments conjugated with a carbon-carbon single bond. Structural details are revealed by single crystal X-ray analyses and electronic properties of these new compounds are studied by optical spectroscopy. The di-[3]cumulenes display absorption profiles resembling those of [n]cumulenes previously reported and peaking between those from [5]-and [7]-cumulenes, suggesting [6]-cumulene like electronic behaviors and effective conjugation between the two [3]-cumulene segments. Our di-[n]cumulene design provides an alternative strategy to extend the lengths of [n]cumulenes beyond those obtainable by current synthetic methodologies while maintaining electronic features towards mimicking that of metallic carbyne. During the synthesis, we discovered an unexpected photo-switchable behavior from a di-[3]cumulene having central phenyl substituents. A [2+2] cycloaddition leads to a compound containing a highly strained cyclobutene ring as the more stable product, in equilibrium with the open di-[3]cumulene in the cis form as the minor component. The reverse [2+2] ring opening reaction can be accelerated by UV exposure, shifting the equilibrium towards the di-cumulene side, and kinetics of these processes are studied in detail with the aid of density functional theory calculations.