Organoniobium chemistry

Organoniobium chemistry is the chemistry of compounds containing niobium-carbon (Nb-C) bonds. Organoniobium compounds often have niobium in the oxidation state +5. A convenient starting material is niobium(V) chloride. Organoniobium(V) compounds are often strongly oxophilic. Organoniobium and organotantalum chemistry are similar, except that the tantalum compounds are more resistant to reduction.

Fundamental compounds

Niobocene dichloride ((C5H5)2NbCl2), a metallocene, is a derivative of Nb(IV).[1] It oxidizes in air to give the oxychloride Cp2NbOCl, a Nb(V) derivative, and correspondingly diamagnetic. Derivatives of pentamethylcyclopentadiene are also known, such as (C5Me5)2NbH3.

The anion [Nb(CO)6]− is the simplest carbonyl of niobium. It is obtained by reduction of NbCl5 under an atmosphere of CO using sodium-potassium alloy.[2]

References

  1. ↑ C. R. Lucas (1990). "Dichlorobis(η5-Cyclopentadienyl)Niobium(IV)". Inorg. Synth. 28: 267–270. ISBN 0-471-52619-3. doi:10.1002/9780470132593.ch68.
  2. ↑ J. E. Ellis, A. Davison, (1976). "Tris[Bis(2-Methoxyethyl)Ether]Potassium and Tetraphenylarsonium Hexacarbonylmetallates(1–) of Niobium and Tantalum". Inorg. Synth. 16: 68–73. doi:10.1002/9780470132470.ch21.
Compounds of carbon with other elements in the periodic table
CH He
CLi CBe CB CC CN CO CF Ne
CNa CMg CAl CSi CP CS CCl CAr
CK CCa CSc CTi CV CCr CMn CFe CCo CNi CCu CZn CGa CGe CAs CSe CBr CKr
CRb CSr CY CZr CNb CMo CTc CRu CRh CPd CAg CCd CIn CSn CSb CTe CI CXe
CCs CBa CHf CTa CW CRe COs CIr CPt CAu CHg CTl CPb CBi CPo CAt Rn
Fr CRa Rf Db CSg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
↓
CLa CCe CPr CNd CPm CSm CEu CGd CTb CDy CHo CEr CTm CYb CLu
Ac CTh CPa CU CNp CPu CAm CCm CBk CCf CEs Fm Md No Lr
Chemical bonds to carbon
Core organic chemistry Many uses in chemistry
Academic research, but no widespread use Bond unknown


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