24小时热门版块排行榜    

查看: 1797  |  回复: 4
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

魏超

金虫 (正式写手)

平平淡淡

[求助] 有3个B错误,请大家帮忙解决一下 已有1人参与

Alert level B
PLAT230_ALERT_2_B Hirshfeld Test Diff for    O2     --  C1      ..       13.0 su   
PLAT417_ALERT_2_B Short Inter D-H..H-D       H2A    ..  H7A     ..       1.87 Ang.
PLAT420_ALERT_2_B D-H Without Acceptor       O7     -   H8A    ...          ?      
--------------------------------------------------------------------------------
分别为
PLAT230 Type_2 Hirshfeld Rigid-Bond Test (Acta Cryst (1976),A32,239-244
--------------------------------------------------------------------------------

The components of the anisotropic displacement parameters along chemical
bonds are assumed to be equal in magnitude. Large differences might
indicate contamination of these parameters with other (unresolved) effects
such as (substitutional) disorder, model or data errors and/or
over-refinement. Atomic sites assigned the wrong scattering type (e.g. Ag
versus Br) should generate 'problem signals' with this test. Data sets
corrected for absorption effects with DELREF techniques (e.g. DIFABS, SHELXA,
XABS2) often show large DELU values for bonds involving the heaviest atom.
Note: The original 'Hirshfeld-test' was defined in absolute terms (see
F.L.Hirshfeld, Acta Cryst. (1976). A32, 239-244). The current test is with
reference to the associated standard uncertainty.

PLAT417 Type_2 Test for short non-bonding inter D-H..H-D contacts
--------------------------------------------------------------------------------

Short non-bonding inter D-H..H-D contacts may be related to disordered or
misplaced H-atoms.
Experience has shown that any intermolecular H...H separation of less than
1.8 Angstroms between unit-occupancy H atoms is a clear indicator that one
or both of these H atoms may be wrongly placed.

PLAT420 Type_2 Test for D-H without acceptor
--------------------------------------------------------------------------------

Potential hydrogen bond donors are checked for the presence of suitable
acceptors using commonly used (Jeffrey) H-bond criteria. As a general rule
there should be an acceptor for each donor. Exceptions are very rare for O-H
and more common for -NH and -NH2. A common error is an -OH on a calculated
position pointing in the wrong direction.

[ Last edited by 魏超 on 2013-2-24 at 10:01 ]
回复此楼

» 猜你喜欢

» 本主题相关价值贴推荐,对您同样有帮助:

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

08113113

木虫 (正式写手)

【答案】应助回帖

引用回帖:
3楼: Originally posted by 魏超 at 2013-02-24 11:49:49
感谢您的帮助,不过我还要麻烦您,DELU C1 O2这个指令在什么地方加,怎么编写,我没有用过,请您给详细写一下。后面的问题,我会改的。请您帮助,谢谢...

用shelxtl的话就在INS那块输入就行,用olex2的话直接输入指令回车即可
4楼2013-02-24 11:58:48
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 5 个回答

08113113

木虫 (正式写手)

【答案】应助回帖

感谢参与,应助指数 +1
第一个是刚性太强了,可以试试DELU C1 O2指令。后面的O7上氢加的有问题,而且氢的命名也不合理,O7接上H8A呢。
2楼2013-02-24 10:09:42
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

魏超

金虫 (正式写手)

平平淡淡

引用回帖:
2楼: Originally posted by 08113113 at 2013-02-24 10:09:42
第一个是刚性太强了,可以试试DELU C1 O2指令。后面的O7上氢加的有问题,而且氢的命名也不合理,O7接上H8A呢。

感谢您的帮助,不过我还要麻烦您,DELU C1 O2这个指令在什么地方加,怎么编写,我没有用过,请您给详细写一下。后面的问题,我会改的。请您帮助,谢谢
3楼2013-02-24 11:49:49
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

jlzhanfeng

铜虫 (小有名气)

【答案】应助回帖

★ ★ ★ ★ ★
魏超: 金币+5, ★★★★★最佳答案 2014-03-11 14:01:47
olex处理方法   DELU 0.01 0.005 ## ##(##分别是两个有问题的原子的名词) 不行就把数值再改小一些 0.001 0.0005再试试
梦想MOF-5
5楼2014-03-07 15:27:58
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 288求调剂,一志愿华南理工大学071005 +3 ioodiiij 2026-03-17 3/150 2026-03-18 09:58 by 求调剂zz
[考研] 278求调剂 +5 烟火先于春 2026-03-17 5/250 2026-03-18 08:43 by 星空星月
[考研] 281求调剂(0805) +3 烟汐忆海 2026-03-16 9/450 2026-03-18 07:23 by 烟汐忆海
[考研] 328求调剂,英语六级551,有科研经历 +3 生物工程调剂 2026-03-16 8/400 2026-03-17 19:03 by Wangjingyue
[考研] 材料工程专硕调剂 +5 204818@lcx 2026-03-17 5/250 2026-03-17 17:27 by Little-xue
[考研] 344求调剂 +4 knight344 2026-03-16 4/200 2026-03-17 17:27 by ruiyingmiao
[考研] 一志愿苏州大学材料工程(085601)专硕有科研经历三项国奖两个实用型专利一项省级立项 +6 大火山小火山 2026-03-16 8/400 2026-03-17 15:05 by 无懈可击111
[考研] 274求调剂 +5 时间点 2026-03-13 5/250 2026-03-17 07:34 by 热情沙漠
[考研] 机械专硕325,寻找调剂院校 +3 y9999 2026-03-15 5/250 2026-03-16 19:58 by y9999
[考研] 材料工程327求调剂 +3 xiaohe12w 2026-03-11 3/150 2026-03-14 20:20 by ms629
[考研] 复试调剂 +3 呼呼?~+123456 2026-03-14 3/150 2026-03-14 16:53 by WTUChen
[考研] 材料080500调剂求收留 +3 一颗meteor 2026-03-13 3/150 2026-03-14 10:54 by peike
[考研] 331求调剂(0703有机化学 +5 ZY-05 2026-03-13 6/300 2026-03-14 10:51 by Jy?
[考研] 329求调剂 +3 miaodesi 2026-03-12 4/200 2026-03-13 20:53 by 18595523086
[考研] 281求调剂 +9 Koxui 2026-03-12 11/550 2026-03-13 20:50 by Koxui
[考研] 26调剂/材料科学与工程/总分295/求收留 +9 2026调剂侠 2026-03-12 9/450 2026-03-13 20:46 by 18595523086
[考研] 274求调剂 +3 S.H1 2026-03-12 3/150 2026-03-13 15:15 by JourneyLucky
[考研] 材料301分求调剂 +5 Liyouyumairs 2026-03-12 5/250 2026-03-13 14:42 by JourneyLucky
[考博] 福州大学杨黄浩课题组招收2026年专业学位博士研究生,2026.03.20截止 +3 Xiangyu_ou 2026-03-12 3/150 2026-03-13 09:36 by duanwu655
[考博] 26读博 +4 Rui135246 2026-03-12 10/500 2026-03-13 07:15 by gaobiao
信息提示
请填处理意见