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Simultaneous exhibition of positive and negative cooperativity by purely C-H—O H-bonded (1,3-cyclohexanedione)n (n = 2-6) clusters: A density functional theoretical investigation
  • Monu Morwal,
  • Binod Oram,
  • Biman Bandyopadhyay
Monu Morwal
Malaviya National Institute of Technology
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Binod Oram
Malaviya National Institute of Technology
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Biman Bandyopadhyay
Malaviya National Institute of Technology
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Peer review status:UNDER REVIEW

09 Jul 2020Submitted to International Journal of Quantum Chemistry
10 Jul 2020Assigned to Editor
10 Jul 2020Submission Checks Completed
20 Jul 2020Reviewer(s) Assigned


Investigation of cooperative effect exhibited by purely C-H—O hydrogen bonded (H-bonded) networks in linear and cyclic clusters of (1,3-cyclohexanedione)n (n = 2 to 6) has been carried out using density functional theoretical calculations. Linear clusters were found to show anti-cooperative behavior, while the cyclic clusters showed positive cooperativity. H-bond strengths and binding energies per bimolecular interaction were found to decrease with increasing cluster size for the linear clusters whereas their cyclic counterparts showed opposite trends. The extent of cooperativity has been found to show monotonic behavior for both linear and cyclic clusters and was found to reach an asymptotic limit with increasing cluster size. Natural bond orbital (NBO) analysis and atoms in molecule (AIM) calculations were found to corroborate the obtained results.