| 查看: 807 | 回复: 2 | ||||
| 当前主题已经存档。 | ||||
| 【有奖交流】积极回复本帖子,参与交流,就有机会分得作者 文言文 的 9 个金币 | ||||
文言文铁杆木虫 (著名写手)
|
[交流]
如何往羟基上面理论加氢?
|
|||
| 我有一个晶体的羟基上面需要加氢,我先利用Q峰的加氢方法加了,但是cif检测没有受体原子,我现在想理论加氢,现在这里需要加一个氢,但是角度怎么看,如何选择合适的受体原子?然后理论加氢的具体步骤是什么?还望高手详细指点一下,非常感谢! |
» 收录本帖的淘帖专辑推荐
单晶解析 |
» 猜你喜欢
江西科技师范大学物理化学课题组接收调剂生,12点开启,速来
已经有0人回复
【2026 考研调剂】哈尔滨工程大学 招收学硕调剂生(英语一、数学一)
已经有0人回复
无机化学论文润色/翻译怎么收费?
已经有283人回复
四川轻化工大学化学与环境工程学院 付昱教授课题组招收调剂硕士研究生
已经有11人回复
大连化物所招收有机背景的博士候选人
已经有0人回复
在MOF中,有没有羧基参加配位的情况
已经有2人回复
招2026年入学上海交通大学博士生,急!!!
已经有1人回复
理论计算合作
已经有0人回复
xi2004
至尊木虫 (职业作家)
- CMEI: 10
- 应助: 125 (高中生)
- 金币: 16769.9
- 散金: 12393
- 红花: 221
- 帖子: 4161
- 在线: 436.9小时
- 虫号: 354550
- 注册: 2007-04-24
- 专业: 结构化学
★ ★
文言文(金币+1,VIP+0):谢谢您,我试试看 9-30 17:00
paopaomeng(金币+1,VIP+0):谢谢交流 9-30 22:22
文言文(金币+1,VIP+0):谢谢您,我试试看 9-30 17:00
paopaomeng(金币+1,VIP+0):谢谢交流 9-30 22:22
|
不知道hfix 87 行不? 在.ins中, 要加氢的那个氧之前, 使用 hfix 87 http://www.ccp14.ac.uk/ccp/web-m ... helxl/restrain.html http://www.ccp14.ac.uk/ccp/web-mirrors/paulboyle/shelxl/HFIX.html 还有hfix 147 m = 14 Idealized OH group, with X-O-H angle tetrahedral. If the coordinates of the hydrogen atom are non-zero, they are used to define the torsion angle. Otherwise (or if HFIX was used to set up the AFIX instruction) the torsion angle is chosen which maximizes the electron density (see m = 13). Since this torsion angle is unlikely to be very accurate, the use of a rotating group refinement is recommended (i.e. mn = 147 before the H atom). m = 8 Idealized OH group, with X-O-H angle tetrahedral. If the oxygen is attached to a saturated carbon, all three staggered positions are considered for the hydrogen. If it is attached to an aromatic ring, both positions in the plane are considered. The final choice is based on forming the 'best' hydrogen bond to a nitrogen, oxygen, chlorine or fluorine atom. The algorithm involves generating a potential position for such an atom by extrapolating the O-H vector, then finding the nearest N, O, F or Cl atom to this position, taking symmetry equivalents into account. If another atom which, (according to the connectivity table) is bonded to the N, O, F or Cl atom, is nearer to the ideal position, the N, O, F or Cl atom is not considered. Note that m = 8 had a different effect in SHELX-76 (but was rarely employed). [ Last edited by xi2004 on 2009-9-30 at 16:44 ] |

2楼2009-09-30 16:41:28
zhaoyangqufu
至尊木虫 (知名作家)
- CMEI: 3
- 应助: 16 (小学生)
- 金币: 15924.8
- 散金: 242
- 红花: 10
- 帖子: 6571
- 在线: 215.2小时
- 虫号: 440284
- 注册: 2007-10-27
- 性别: GG
- 专业: 无机化学
3楼2009-09-30 17:47:54












回复此楼
10