| 查看: 2021 | 回复: 5 | |||
| 当前主题已经存档。 | |||
| 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 | |||
hanks2010木虫 (著名写手)
wu
|
[交流]
求教关于柠檬酸与金属离子的络合
|
||
|
举个例子吧： 将Rh(NO3)3溶液和柠檬酸溶液混合搅拌，柠檬酸和Rh离子间形成的络合物是什么形式？ 此外，还有像Ce(NO3)3或者ZrO(NO3)2溶液和柠檬酸溶液混合后呢？ 还有个问题，用什么方法可以将Pd(NO3)3或Rh(NO3)3中的金属阳离子转到类似氯铂酸根离子的阴离子里面去呢？ [ Last edited by hanks2010 on 2007-11-4 at 15:14 ] |
回复此楼» 猜你喜欢
国家级人才课题组招收2026年化学，材料化工 调剂生
已经有0人回复
-
国家级人才团体课题组招收2026届化学类学硕，专硕。
已经有1人回复
-
专业论文润色/翻译怎么收费?
已经有170人回复
-
河南理工大学绿色催化课题组招收材料，化工，化学等方向研究生
已经有0人回复
-
国家级人才课题组招研究生 （催化方向）调剂
已经有13人回复
-
招收硕士研究生
已经有21人回复
-
[天津]中国民航大学 招收材料类研究生
已经有0人回复
-
材料与化工专业有大量调剂指标
已经有7人回复
-
国家大人才课题组招收化学、材料化工类2026年调剂生
已经有0人回复
-
085600调剂
已经有3人回复
-
浙师大化与材学院2026年有大量硕士研究生调剂名额 （线上 调剂）
已经有6人回复
daiqiguang
荣誉版主 (知名作家)
- C-EPI: 1
- 应助: 4 (幼儿园)
- 贵宾: 3.1
- 金币: 1496.6
- 散金: 104
- 红花: 29
- 帖子: 5485
- 在线: 565.7小时
- 虫号: 186979
- 注册: 2006-02-16
- 性别: GG
- 专业: 工业催化/材料、环境催化
- 管辖: 催化
3楼2007-11-05 19:33:31
★ ★ ★ ★
rabbit7708(金币+2,VIP+0):鼓励新虫应助喽，欢迎常来催化版！：）
nxl5096224(金币+2,VIP+0):多谢应助咯~3Q!
rabbit7708(金币+2,VIP+0):鼓励新虫应助喽，欢迎常来催化版！：）
nxl5096224(金币+2,VIP+0):多谢应助咯~3Q!
|
I used the chelating reaction before. I can not answer your question completely this time. but I carefully searched literatures and found one example (De chelating) for you. Unfortunately it was an old literature (should be old!!). The abstract may provide some useful informaiton for you. See the following. I think there is no big difference for ion chelated citric acid, except numbers of ligand. Complex cerium citrates. Sil'nichenko, V. G. Redkozem. Elementy, Akad. Nauk SSSR, Inst. Geokhim. i Analit. Khim (1963), 145-8. Journal language unavailable. CAN 61:23010 AN 1964:423010 CAPLUS Abstract The complex formation of Ce(III) and Ce(IV) with Na citrate was investigated. The prepn. of CeC6H5O7.3H2O (I), Na3[Ce(C6H5O7)2] .3H2O (II), and Na4[CeO(C6H5O7)2].3HO (III) is described. The compds. were obtained through reaction of the corresponding stoichiometrical amts. of Ce(NO3)3 and Na3C6H5O7. In these compds. the coordination no. of Ce (6) is satd. by 2 citric acid residues which are bound through the O atoms of the carboxyl groups. Some Ce dicitrate complexes of the type M3[Ce(C6H5O7)2] (M = Na, K, NH4) were synthesized with different alkali metal in the outer coordination sphere. Addn. of heavy metals solns. to the solns. of these complex dicitrates resulted in substitutions in the complex inner sphere leading to the formation of ppts. of low soly. Particularly, addn. of Ce(III) soln. to the soln. of the Na dicitrate resulted in the pptn. of a compd. chem. characterized as CeC6H5O7 although it is assumed to be more probably an innersphere substitution product of the complex dicitrate whose formula Ce[Ce(C6H5O7)2] does not differ from that of the simple compd. from an anal. standpoint. The compds. I, II, and III were submitted to differential thermal and thermogravimetric analysis which showed that the water of crystn. was lost smoothly without decompn. up to 200 for I and II, while the corresponding curve of III showed a sharp max. at 120 related to the transformation of Ce(IV) into Ce(III). [ Last edited by whasn204 on 2007-11-5 at 19:30 ] |
2楼2007-11-05 19:28:58
hanks2010
木虫 (著名写手)
wu
- 应助: 15 (小学生)
- 贵宾: 1.15
- 金币: 2791.5
- 散金: 2
- 红花: 3
- 帖子: 2742
- 在线: 128.2小时
- 虫号: 47325
- 注册: 2004-06-05
- 性别: GG
- 专业: 催化化学
4楼2007-11-05 19:54:51
★ ★
nxl5096224(金币+2,VIP+0):多谢应助啦~
nxl5096224(金币+2,VIP+0):多谢应助啦~
|
是的。 柠檬酸是一种常见的chelating agent，另外还有一个叫EDTA. 它们络和的机理很类似，均是通过N, 或 O电负性较强的阴离子作用于阳离子中心，形成的是一个复合物，结构相对稳定。 Wiki有这样一个解释： The ligand forms a chelate complex with the substrate. The term is reserved for complexes in which the metal ion is bound to two or more atoms of the chelating agent, although the bonds may be any combination of coordination or ionic bonds. 如果想了解更多，可以参看这个条目： http://en.wikipedia.org/wiki/Chelating_agent |
5楼2007-11-06 14:02:19
