ONeill
Harmless
Posts: 5
Registered: 7-10-2012
Member Is Offline
Mood: No Mood
|
|
Nomenclature of Coordinative Compounds
Hello mad scientist,
I hope this si the right subsection of the discussion board for my question.
So in coordination compounds (with metal = M) you sort the ligands (e.g., A, B, C) by the alphabet:
[MABC]
When you have a ligand with an atom that has an element symbol that is longer than one letter, the element with the single letter element symbol goes
first, e.g., a single carbon (hypothetically) comes before chlorido:
[M C Cl] added spaces to make it more visible
But how is it with abbrevations such as Cp? I am aware that IUPAC discourages abbrevations in general, but Cp is so common in the literature. Is
titanocene dichloride [Ti (Cp)2 Cl2] or [Ti Cl2 (Cp)2]
I tried to find the answer in the Red Book from IUPAC, but was not successful. Maybe the smart members here can give me some advice. I appreciate your
time.
Many thanks,
ONeill
|
|
|
njl
National Hazard
Posts: 609
Registered: 26-11-2019
Location: under the sycamore tree
Member Is Offline
Mood: ambivalent
|
|
For some reason I always see Cp first as in (Cp)2[TiCl2]. Whether or not that's correct, I don't know.
Reflux condenser?? I barely know her!
|
|
|
DraconicAcid
International Hazard
Posts: 4332
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Offline
Mood: Semi-victorious.
|
|
Ti(Cp)2Cl2 or Cp2TiCl2. (Cp)2[TiCl2] would suggest that the cyclopentadienyls are cations, and not coordinated to the TiCl2 anion. Chemists who
write it that way should be slapped. Square brackets have a defined meaning, people!
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
