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a40: "[*:1]~[#15:2]~[*:3]"

Angle in degrees

k in kcal/mol/rad^2

Smirnoff99 Frosst

109.5

140

OpenFF 1.0.0

122

149.21

OpenFF 1.2.0

147

139.27

OpenFF 1.3.0

147

163.22

OpenFF 2.0.0

157

129.75

In some experimental fits (dexp ones)

angle is hovering around 170 degrees and in some cases crossed 180 degrees resulting in openmm fails

around 130

In MSM(A+B) starting point refit

119

122.72

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Code Block
Angle indices, QM angle
(15, 19, 16) 105
(15, 19, 17) 106
(15, 19, 18) 107
(16, 19, 17) 103
(16, 19, 18) 117
(17, 19, 18) 118

Image RemovedImage Added

Code Block
Angle indices, QM angle
(0, 4, 2) 118
(0, 4, 3) 101
(0, 4, 10) 103
(2, 4, 3) 114
(2, 4, 10) 115
(3, 4, 10) 103

Code Block
Angle indices, QM angle
(12, 17, 14) 104
(12, 17, 15) 120
(12, 17, 16) 112
(14, 17, 15) 102
(14, 17, 16) 109
(15, 17, 16) 109
Code Block
Angle indices, QM angle
(4, 8, 6) 117
(4, 8, 7) 106
(4, 8, 9) 97
(6, 8, 7) 112
(6, 8, 9) 114
(7, 8, 9) 109
Code Block
Angle indices, QM angle
(4, 9, 6) 118
(4, 9, 7) 106
(4, 9, 8) 95
(6, 9, 7) 113
(6, 9, 8) 116
(7, 9, 8) 107
Code Block
Angle indices, QM angle
(5, 7, 6) 116
(5, 7, 8) 105
(5, 7, 9) 105
(6, 7, 8) 114
(6, 7, 9) 114
(8, 7, 9) 102
Image RemovedImage Added
Code Block
Angle indices, QM angle
(1, 0, 2) 102
(1, 0, 3) 102
(2, 0, 1) 102
(2, 0, 3) 102
Code Block
Angle indices, QM angle
(4, 9, 6) 116
(4, 9, 7) 116
(4, 9, 8) 117
(6, 9, 4) 116
(6, 9, 7) 104
(6, 9, 8) 101
(7, 9, 8) 100
Code Block
Angle indices, QM angle
(6, 9, 8) 118
(6, 9, 10) 107
(6, 9, 11) 97
(8, 9, 10) 115
(8, 9, 11) 115
(10, 9, 11) 103

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