CheckCIF-PLAT311-320
PLAT311 Type_2 Test for isolated Disordered Oxygen Atoms
This test reports on oxygen atoms (not full weight) that are not within bonding distance to any other atom in the structure. A common reason may be that no hydrogen atoms are given for a water molecule.
(http://journals.iucr.org/services/cif/checking/PLAT311.html)
警告原因:存在游離的無(wú)序氧原子。
解決策略:一般都是游離的水分子,有合理解釋即可。
PLAT312 Type_2 Test for C=O-H
Strange C-O-H geometry with C-O < 1.25 Angstrom detected. Misplaced H-Atom ?
檢測(cè)到C-O鍵鍵長(zhǎng)小于1.25 ?的奇怪C-O-H幾何構(gòu)型。氫原子位置錯(cuò)了?
(http://journals.iucr.org/services/cif/checking/PLAT312.html)
警告原因:鍵長(zhǎng)小于1.25 ?的C-O結(jié)構(gòu)中氧原子上存在氫原子。
解決策略:檢查是否加錯(cuò)氫原子,否則需要給出合理解釋。
PLAT313 Type_2 Test for O with three covalent bonds
Oxygen atom with three covalent bonds detected. Check for correct atom type assignment (e.g. N rather than O)
Note: Exceptions are H3O+ (Oximium or Hydroxonium) and H5O2+ (Hydronium or aqua-hydroxonium) species.
檢測(cè)到有三個(gè)共價(jià)鍵的氧原子。檢查是否指認(rèn)正確原子類型(例如是N而不是O)。
注意: H3O+ (Oximium or Hydroxonium)和H5O2+ (Hydronium or aqua-hydroxonium)除外。
(http://journals.iucr.org/services/cif/checking/PLAT313.html)
警告原因:結(jié)構(gòu)中存在具有三個(gè)共價(jià)鍵的氧原子。
解決策略:檢查是否原子類型定錯(cuò),否則需要給出合理解釋。
PLAT314 Type_2 Test for Metal-O-H angle of H2O
A water molecule coordinated to a metal is detected with an unusually small value of the Metal-Oxygen-Hydrogen Angle.
檢測(cè)到與金屬配位的水分子,其M-O-H角異常小。
(http://journals.iucr.org/services/cif/checking/PLAT314.html)
警告原因:結(jié)構(gòu)中存在金屬配位的水分子,但其M-O-H角異常小。
解決策略:檢查是否該氧原子上氫原子加錯(cuò)(方向不對(duì)),有則改之,否則需要給出合理解釋。
PLAT315 Type_2 Test for single bonded Carbon atom
Check for missing H-atoms.
檢查缺失的氫原子。
(http://journals.iucr.org/services/cif/checking/PLAT315.html)
警告原因:結(jié)構(gòu)中存在只有一根鍵的碳原子。
解決策略:檢查是否忘記加氫,否則需要給出合理解釋。
PLAT316 Type_2 Check for too many H's on C in C=N bond in main residue(s)
An sp3 hybridized C was detected as part of a C=N moiety. Only one attached H atom in sp2 configuration is expected and not two. In SHELXL terms this corresponds with an erroneous AFIX 23 rather than an AFIX 43 type of H atom position generation and refinement.
檢測(cè)到sp3雜化的碳作為C=N的一部分。C=N中sp2構(gòu)型的碳只連接一個(gè)氫原子,而不是兩個(gè)。在SHELXL術(shù)語(yǔ)中,這對(duì)應(yīng)于采用了錯(cuò)誤的AFIX 23,而不是AFIX 43類型的氫原子位置生成和精修。
(http://journals.iucr.org/services/cif/checking/PLAT316.html)
警告原因:C=N結(jié)構(gòu)碳原子氫原子加錯(cuò)。
解決策略:刪除該碳原子上的氫原子,重新加氫。
PLAT317 Type_2 Check for too many H's on C in C=N bond in Solvent/Ion (s)
An sp3 hybridized C was detected as part of a C=N moiety. Only one attached H atom in sp2 configuration is expected and not two. In SHELXL terms this corresponds with an erroneous AFIX 23 rather than an AFIX 43 type of H atom position generation and refinement.
檢測(cè)到sp3雜化的碳作為C=N的一部分。C=N中sp2構(gòu)型的碳只連接一個(gè)氫原子,而不是兩個(gè)。在SHELXL術(shù)語(yǔ)中,這對(duì)應(yīng)于采用了錯(cuò)誤的AFIX 23,而不是AFIX 43類型的氫原子位置生成和精修。
(http://journals.iucr.org/services/cif/checking/PLAT317.html)
警告原因:溶劑/離子C=N結(jié)構(gòu)碳原子上氫原子加錯(cuò)。
解決策略:刪除該碳原子上的氫原子,重新加氫。
PLAT318 Type_2 Hybridisation Problem on N in main residue(s)
The test attempts to assign one of three hybridisations to N atoms in main residue: sp, sp2 or sp3 on the basis of the angles around N. This ALERT may indicate a mis-assigned H atom position (e.g. an atom placed in a sp2 position instead of sp3).
此檢查試圖根據(jù)N周圍的角度來(lái)指認(rèn)主要?dú)埢蠳原子的三種雜化方式之一:sp、sp2或sp3。此警告可能表明氫原子位置指認(rèn)錯(cuò)誤(例如將一個(gè)原子置于sp2位置而非sp3位置)。
(http://journals.iucr.org/services/cif/checking/PLAT318.html)
警告原因:結(jié)構(gòu)中氮原子上氫原子加錯(cuò)。
解決策略:刪除該碳原子上的氫原子,重新加氫。
PLAT319 Type_2 Hybridisation Problem on N in solvent/ion
The test attempts to assign one of three hybridisations to N atoms in main residue: sp, sp2 or sp3 on the basis of the angles around N. This ALERT may indicate a mis-assigned H atom position (e.g. an atom placed in a sp2 position instead of sp3).
此檢查試圖根據(jù)N周圍的角度來(lái)指認(rèn)主要?dú)埢蠳原子的三種雜化方式之一:sp、sp2或sp3。此警告可能表明氫原子位置指認(rèn)錯(cuò)誤(例如將一個(gè)原子置于sp2位置而非sp3位置)。
(http://journals.iucr.org/services/cif/checking/PLAT319.html)
警告原因:結(jié)構(gòu)中溶劑/離子氮原子上氫原子加錯(cuò)。
解決策略:刪除該碳原子上的氫原子,重新加氫。
PLAT320 Type_2 Hybridisation Problem on C in main residue(s)
The test attempts to assign one of three hybridisations to C atoms in main residue: sp, sp2 or sp3 on the basis of the angles around C. In this way, missing H atoms or too many H-atoms on a carbon atom should be detected.
此檢查試圖根據(jù)C周圍的角度來(lái)指認(rèn)主要?dú)埢蠧原子的三種雜化方式之一:sp、sp2或sp3。如此便可檢測(cè)到碳原子上缺少氫原子或存在過多氫原子。
(http://journals.iucr.org/services/cif/checking/PLAT320.html)
警告原因:結(jié)構(gòu)中某個(gè)(或某些)碳原子上氫原子缺少或過多。
解決策略:刪除這些存在問題的碳原子上的氫原子并對(duì)其進(jìn)行重新加氫。