PLAT360 Type_2 Test for short C4 - C4 (Angstrom Difference) XRAY: 1.54

Large deviations from generally accepted values may indicate model problems, over refinement etc. Default C4-C4 = 1.54 Ang. (X-Ray) value from Ladd & Palmer, Structure Determination by Xray Crystallography (1985).

Note: - C4-C4 indicates a bond between atoms with 4 bonds each.

(http://journals.iucr.org/services/cif/checking/PLAT360.html)

例：PLAT360_ALERT_2_C Short C(sp3)-C(sp3) Bond C24 - C35

警告原因：C(sp3)-C(sp3)鍵鍵長過短。

解決策略：檢查是否需要無序處理，或用DFIX限制C24-C35距離后精修。

PLAT361 Type_2 Test for long C4 - C4 (Angstrom Difference) XRAY: 1.54

Large deviations from generally accepted values may indicate model problems, over refinement etc. Default C4-C4 = 1.54 Ang. (X-Ray) value from Ladd & Palmer, Structure Determination by Xray Crystallography (1985).

Note: - C4-C4 indicates a bond between atoms with 4 bonds each.

(http://journals.iucr.org/services/cif/checking/PLAT361.html)

警告原因：C(sp3)-C(sp3)鍵鍵長過長。

解決策略：檢查是否需要無序處理，或用DFIX限制距離后精修。

PLAT362 Type_2 Test for short C4 - C3 (Angstrom Difference) XRAY: 1.52

Large deviations from generally accepted values may indicate model problems, over refinement etc. Default C4-C3 = 1.52 Ang. (X-Ray) value from Ladd & Palmer, Structure Determination by Xray Crystallography (1985).

Note:

- C4-C3 indicates a bond between an atom with 4 bonds and one with 3 bonds.

- Conjugated systems may cause some 'false alarm' messages.

(http://journals.iucr.org/services/cif/checking/PLAT362.html)

警告原因：C(sp3)-C(sp2)鍵鍵長過短。

解決策略：檢查是否需要無序處理，或用DFIX限制距離后精修。

PLAT363 Type_2 Test for long C4 - C3 (Angstrom Difference) XRAY: 1.52

Large deviations from generally accepted values may indicate model problems, over refinement etc. Default C4-C3 = 1.52 Ang. (X-Ray) value from Ladd & Palmer, Structure Determination by Xray Crystallography (1985).

Note:

- C4-C3 indicates a bond between an atom with 4 bonds and one with 3 bonds.

- Conjugated systems may cause some 'false alarm' messages.

(http://journals.iucr.org/services/cif/checking/PLAT363.html)

警告原因：C(sp3)-C(sp2)鍵鍵長過長。

解決策略：檢查是否需要無序處理，或用DFIX限制距離后精修。

PLAT364 Type_2 Test for short C4 - C2 (Angstrom Difference) XRAY: 1.46

Large deviations from generally accepted values may indicate model problems, over refinement etc. Default C4-C2 = 1.46 Ang. (X-Ray) value from Ladd & Palmer, Structure Determination by Xray Crystallography (1985).

Note:

- C4-C2 indicates a bond between an atom with 4 bonds and one with 2 bonds.

- Conjugated systems may cause some 'false alarm' messages.

(http://journals.iucr.org/services/cif/checking/PLAT364.html)

警告原因：C(sp3)-C(sp)鍵鍵長過短。

解決策略：檢查是否需要無序處理，或用DFIX限制距離后精修。

PLAT365 Type_2 Test for long C4 - C2 (Angstrom Difference) XRAY: 1.46

Large deviations from generally accepted values may indicate model problems, over refinement etc. Default C4-C2 = 1.46 Ang. (X-Ray) value from Ladd & Palmer, Structure Determination by Xray Crystallography (1985).

Note:

- C4-C2 indicates a bond between an atom with 4 bonds and one with 2 bonds.

- Conjugated systems may cause some 'false alarm' messages.

(http://journals.iucr.org/services/cif/checking/PLAT365.html)

警告原因：C(sp3)-C(sp)鍵鍵長過長。

解決策略：檢查是否需要無序處理，或用DFIX限制距離后精修。

PLAT366 Type_2 Test for short C? - C? (Angstrom Difference) XRAY: 1.50

The hybridisation of at least one carbon atom is not recognized. Large deviations from generally accepted values for a C-C bond may indicate model problems, unresolved disorder, over_refinement etc. The C-C bond is tested to be not shorter than 1.15 Angstrom.

(http://journals.iucr.org/services/cif/checking/PLAT366.html)

警告原因：C(sp?)-C(sp?)鍵鍵長過短。

解決策略：檢查是否需要無序處理，或用DFIX限制距離后精修。

PLAT367 Type_2 Test for long C? - C? (Angstrom Difference) XRAY: 1.50

Large deviations from generally accepted values may indicate model problems, over refinement etc. Default C?-C? = 1.50 Ang. (X-Ray) value from Ladd & Palmer, Structure Determination by Xray Crystallography (1985).

(http://journals.iucr.org/services/cif/checking/PLAT367.html)

警告原因：C(sp?)-C(sp?)鍵鍵長過長。

解決策略：檢查是否需要無序處理，或用DFIX限制距離后精修。

PLAT368 Type_2 Test for short C3 - C3 (Angstrom Difference) XRAY: 1.34

Large deviations from generally accepted values may indicate model problems, over refinement etc. Default C3-C3 = 1.34 Ang. (X-Ray) value from Ladd & Palmer, Structure Determination by Xray Crystallography (1985).

Note:

- C3-C3 indicates a bond between atoms with 3 bonds each.

- Conjugated systems may cause some 'false alarm' messages.

(http://journals.iucr.org/services/cif/checking/PLAT368.html)

警告原因：C(sp2)-C(sp2)鍵鍵長過短。

解決策略：檢查是否需要無序處理，或用DFIX限制距離后精修。

PLAT369 Type_2 Test for long C3 - C3 (Angstrom Difference) XRAY: 1.34

Large deviations from generally accepted values may indicate model problems, over refinement etc.? Default C3-C3 = 1.34 Ang. (X-Ray) value from Ladd & Palmer, Structure Determination by Xray Crystallography (1985).

Note:

- C3-C3 indicates a bond between atoms with 4 with 3 bonds each.

- Conjugated systems may cause some 'false alarm' messages.

- A notable exception is the C-C bond in -C(=O)-C(=O)- systems with an observed mean value of 1.54 Angstrom.

(http://journals.iucr.org/services/cif/checking/PLAT369.html)

例：PLAT369_ALERT_2_B Long C(sp2)-C(sp2) Bond C32 - C32_i

警告原因：C(sp2)-C(sp2)鍵鍵長過長。

解決策略：檢查是否需要無序處理，用DFIX限制C32-C32_i距離后精修。