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some of the acid and amide dimers optimized to highly nonplanar, twisted, and nonacceptable conformations; however, both nitro dimers are well behaved. To make sure that a similar planar conformation is maintained in all four dimers, constraint in the dihedral angle was applied in all. While calculating the HBE, values of molecules with similar constraints were considered.
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In the absence of any constraint, some of the acid and amide dimers optimized to highly nonplanar, twisted, and nonacceptable conformations; however, both nitro dimers are well behaved. To make sure that a similar planar conformation is maintained in all four dimers, constraint in the dihedral angle was applied in all. While calculating the HBE, values of molecules with similar constraints were considered.
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In the absence of any constraint
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41
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85022682342
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whereas for complete pyramidality, according to sp3 type bonding, is ~0.34 Å. Also, no significant deviation in β; and γ are observed between the pyramidal and planar conformations.
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The maximum deviation of nitrogen from the plane of three connected atoms is only ~0.12 Å, whereas for complete pyramidality, according to sp3 type bonding, is ~0.34 Å. Also, no significant deviation in β; and γ are observed between the pyramidal and planar conformations.
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The maximum deviation of nitrogen from the plane of three connected atoms is only ~0.12
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42
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85022687726
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σ values and are from: Hansch, C., Leo, A.; Substituent Constants for Correlation Analysis in Chemistry and Biology; John Wiley & Sons: New York
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The strength of the donors and acceptors are baaed on the Hammett constants, σ values and are from: Hansch, C., Leo, A.; Substituent Constants for Correlation Analysis in Chemistry and Biology; John Wiley & Sons: New York, 1979.
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(1979)
The strength of the donors and acceptors are baaed on the Hammett constants
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