24小时热门版块排行榜    

北京石油化工学院2026年研究生招生接收调剂公告
查看: 1816  |  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

兑换贵宾

平平淡淡

优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!

[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

jlzhanfeng

兑换贵宾

优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!

【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
查看全部 5 个回答

08113113

兑换贵宾

优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!

【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

管理员

平平淡淡

优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!

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

08113113

兑换贵宾

优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!

【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
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 311(085601)求调剂 +12 liziyeyeye 2026-03-28 13/650 2026-04-01 00:34 by fmesaito
[考研] 070300化学279求调剂 +9 哈哈哈^_^ 2026-03-31 11/550 2026-03-31 20:32 by sophie2180
[考研] 285求调剂 +3 FZAC123 2026-03-30 3/150 2026-03-31 17:49 by 热情沙漠
[考研] 318求调剂 +10 陈晨79 2026-03-30 10/500 2026-03-31 17:37 by 544594351
[考研] 生医工0831调剂求推荐 +4 小熊睿睿_s 2026-03-27 6/300 2026-03-31 17:12 by 记事本2026
[考研] 315求调剂 +6 akie... 2026-03-28 7/350 2026-03-31 16:48 by asdfzly
[考研] 286求调剂 +6 Faune 2026-03-30 6/300 2026-03-31 14:37 by jp9609
[考研] 一志愿西电085401数一英一299求调剂 六级521 +4 爱吃大鸭梨 2026-03-31 4/200 2026-03-31 11:51 by 搏击518
[考研] 266分,求材料相关专业调剂 +10 哇呼哼呼哼 2026-03-30 12/600 2026-03-31 11:00 by 熊一刀
[考研] 求调剂 +4 图鉴212 2026-03-30 4/200 2026-03-31 10:20 by cal0306
[考研] 293分求调剂,外语为俄语 +5 加一一九 2026-03-31 5/250 2026-03-31 09:39 by zhshch
[考研] 环境科学与工程334分求调剂 +6 王一一依依 2026-03-30 8/400 2026-03-30 11:52 by yjolah
[考研] 本科新能源科学与工程,一志愿华理能动285求调剂 +7 AZMK 2026-03-28 11/550 2026-03-28 21:01 by xxxsssccc
[考研] 312,生物学求调剂 +3 小译同学abc 2026-03-28 3/150 2026-03-28 15:32 by 落睿可思
[考研] 283求调剂 +7 A child 2026-03-28 7/350 2026-03-28 12:05 by zllcz
[考研] 340求调剂 +5 jhx777 2026-03-27 5/250 2026-03-28 04:18 by fmesaito
[考研] 298调剂 +3 jiyingjie123 2026-03-27 3/150 2026-03-27 11:57 by wxiongid
[论文投稿] Journal of Mechanical Science and Technology +3 Russ_ss 2026-03-25 5/250 2026-03-27 10:49 by 陆小果画大饼
[考研] 324求调剂 +5 hanamiko 2026-03-26 5/250 2026-03-27 10:33 by wangjy2002
[考研] 环境专硕324分求调剂推荐 +5 轩小宁—— 2026-03-26 5/250 2026-03-26 12:05 by i_cooler
信息提示
请填处理意见