Molybdenum dichloride dioxide is the
inorganic compound
In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemist ...
with the formula MoO
2Cl
2. It is a yellow diamagnetic solid that is used as a precursor to other molybdenum compounds. Molybdenum dichloride dioxide is one of several
oxychloride
In chemistry, molecular oxohalides (oxyhalides) are a group of chemical compounds in which both oxygen and halogen atoms are attached to another chemical element A in a single molecule. They have the general formula , where X = fluorine (F), chlor ...
s of molybdenum.
Structure
Gaseous molybdenum dichloride dioxide is a monomer, but upon condensation, it polymerizes to give a
coordination polymer
A coordination polymer is an inorganic or organometallic polymer structure containing metal cation centers linked by ligands. More formally a coordination polymer is a coordination compound with repeating coordination entities extending in 1, 2, o ...
of uncertain structure.
Preparation
The compound is most easily prepared by treatment
molybdenum trioxide
Molybdenum trioxide describes a family of inorganic compounds with the formula MoO3(H2O)n where n = 0, 1, 2. These compounds are produced on the largest scale of any molybdenum compound. The anhydrous oxide is a precursor to molybdenum metal, an ...
with concentrated
hydrochloric acid
Hydrochloric acid, also known as muriatic acid, is an aqueous solution of hydrogen chloride. It is a colorless solution with a distinctive pungent smell. It is classified as a strong acid
Acid strength is the tendency of an acid, symbol ...
:
:MoO
3 + 2 HCl → MoO
2Cl
2 + H
2O
MoO
2Cl
2 can also be prepared from
MoOCl4:
:MoOCl
4 + O(Si(CH
3)
3)
2 → MoO
2Cl
2 + 2 ClSi(CH
3)
3
It is also prepared by chlorination of
molybdenum dioxide
Molybdenum dioxide is the chemical compound with the formula MoO. It is a violet-colored solid and is a metallic conductor. The mineralogical form of this compound is called tugarinovite, and is only very rarely found.
Structure
It crystallize ...
:
[
:MoO2 + Cl2 → MoO2Cl2
It is also prepared by chlorination of molybdenum trixoide:]
Reactions
Many bisadduct
An adduct (from the Latin ''adductus'', "drawn toward" alternatively, a contraction of "addition product") is a product of a direct addition of two or more distinct molecules, resulting in a single reaction product containing all atoms of all co ...
s are known of the type MoO2Cl2(ether)2. These octahedral molecular complexes are soluble in organic solvents.
With bulky aniline
Aniline is an organic compound with the formula C6 H5 NH2. Consisting of a phenyl group attached to an amino group, aniline is the simplest aromatic amine
In organic chemistry, an aromatic amine is an organic compound consisting of an aroma ...
s, it converts to the diimido complex MoCl2(NAr)2(dimethoxyethane
Dimethoxyethane, also known as glyme, monoglyme, dimethyl glycol, ethylene glycol dimethyl ether, dimethyl cellosolve, and DME, is a colorless, aprotic, and liquid ether that is used as a solvent, especially in batteries. Dimethoxyethane is misci ...
). This complex is the precursor to the Schrock carbenes of the type Mo(OR)2(NAr)(CH-t-Bu).
Related compounds
Molybdenum difluoride dioxide exists as a sublimable white solid, in contrast to the dichloride.
References
Molybdenum(VI) compounds
Oxychlorides
{{Inorganic-compound-stub