We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
London Dispersion Effects in a Distannene/Tristannane Equilibrium: Energies of their Interconversion and the Suppression of the Monomeric Stannylene Intermediate.
- Authors
Zou, Wenxing; Bursch, Markus; Mears, Kristian L.; Stennett, Cary R.; Yu, Ping; Fettinger, James C.; Grimme, Stefan; Power, Philip P.
- Abstract
Reaction of {LiC6H2−2,4,6‐Cyp3⋅Et2O}2 (Cyp=cyclopentyl) (1) of the new dispersion energy donor (DED) ligand, 2,4,6‐triscyclopentylphenyl with SnCl2 afforded a mixture of the distannene {Sn(C6H2−2,4,6‐Cyp3)2}2 (2), and the cyclotristannane {Sn(C6H2−2,4,6‐Cyp3)2}3 (3). 2 is favored in solution at higher temperature (345 K or above) whereas 3 is preferred near 298 K. Van't Hoff analysis revealed the 3 to 2 conversion has a ΔH=33.36 kcal mol−1 and ΔS=0.102 kcal mol−1 K−1, which gives a ΔG300 K= 2.86 kcal mol−1, showing that the conversion of 3 to 2 is an endergonic process. Computational studies show that DED stabilization in 3 is −28.5 kcal mol−1 per {Sn(C6H2−2,4,6‐Cyp3)2 unit, which exceeds the DED energy in 2 of −16.3 kcal mol−1 per unit. The data clearly show that dispersion interactions are the main arbiter of the 3 to 2 equilibrium. Both 2 and 3 possess large dispersion stabilization energies which suppress monomer dissociation (supported by EDA results).
- Subjects
LONDON (England); DISPERSION (Chemistry); EQUILIBRIUM; HIGH temperatures; TIN
- Publication
Angewandte Chemie, 2023, Vol 135, Issue 22, p1
- ISSN
0044-8249
- Publication type
Academic Journal
- DOI
10.1002/ange.202301919