Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 136, Issue 50, Pages 17386-17389Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja5101245
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Funding
- DOE [DE-FG02-97ER25308]
- National Science Foundation [CHE-1300497]
- NSF CRIF [CHE-0946869]
- Georgia Tech.
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1300497] Funding Source: National Science Foundation
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The influence of substituents on p-stacking interactions has previously been explained by two competing hypotheses: a nonlocal effect in which tuning of the p density by the substituent alters the interaction (the Hunter-Sanders picture) or a local effect in which the direct interaction of the added substituent and changed polarity of the phenyl-substituent sigma bond alter the interaction (the Wheeler-Houk picture). In this work, we applied the recently developed functional-group partition of symmetry-adapted perturbation theory (F-SAPT) to directly quantify these two effects in situ. The results show that both pictures contribute to the change in interaction energy but that the Wheeler-Houk picture is usually dominant.
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