Read More
Date: 23-6-2019
780
Date: 23-2-2017
505
Date: 27-2-2017
497
|
Structural isomerism: ionization isomers
Ionization isomers result from the interchange of an anionic ligand within the first coordination sphere with an anion outside the coordination sphere. Examples of ionization isomers are violet [Co(NH3)5Br][SO4] (prepared by reaction scheme 1.1) and red [Co(NH3)5(SO4)]Br (prepared by reaction sequence 1.2). These isomers can be readily distinguished by appropriate qualitative tests for ionic sulfate or bromide, respectively. The isomers are also easily distinguished by IR spectroscopy; free and coordinated sulfate ions give rise to one or three IR active S_O stretching vibrations respectively.
(1.1)
(1.2)
|
|
علامات بسيطة في جسدك قد تنذر بمرض "قاتل"
|
|
|
|
|
أول صور ثلاثية الأبعاد للغدة الزعترية البشرية
|
|
|
|
|
مكتبة أمّ البنين النسويّة تصدر العدد 212 من مجلّة رياض الزهراء (عليها السلام)
|
|
|