Titanium(II) chloride

Titanium(II) chloride
Titanium(II) chloride
Identifiers
CAS number 10049-06-6
PubChem 66228
ChemSpider 8466246 YesY
Jmol-3D images Image 1
Properties
Molecular formula Cl2Ti
Molar mass 118.77 g mol−1
Appearance black hexagonal crystals
Density 3.13 g/cm3
Melting point

1035°C

Boiling point

1500°C[1]

Hazards
MSDS External MSDS
EU classification Harmful Xn Corrosive C
 YesY chloride (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Titanium(II) chloride is the chemical compound with the formula TiCl2. The black solid has been studied only moderately, probably because of its high reactivity.[2] Ti(II) is a strong reducing agent: it has a high affinity for oxygen and reacts irreversibly with water to produce H2. The usual preparation is the thermal disproportionation of TiCl3 at 500 °C. The equilibrium is "driven" by the loss of volatile TiCl4:

2 TiCl3 → TiCl2 + TiCl4

The method is similar to that for the conversion of VCl3 into VCl2 and VCl4.

TiCl2 crystallizes as the layered CdI2 structure. Thus, the Ti(II) centers are octahedrally coordinated to six chloride ligands.[3][4]

Derivatives

Molecular complexes are known such as TiCl2(chel)2, where chel is DMPE ((CH3)2PCH2CH2P(CH3)2 and TMEDA ((CH3)2NCH2CH2N(CH3)2).[5] Such species are prepared by reduction of related Ti(III) and Ti(IV) complexes.

Unusual electronic effects have been observed in these species: TiCl2[(CH3)2PCH2CH2P(CH3)2]2 is paramagnetic with a triplet ground state, but Ti(CH3)2[(CH3)2PCH2CH2P(CH3)2]2 is diamagnetic.[6]

A solid-state derivative of TiCl2 is Na2TiCI4, which has been prepared by the reaction of Ti metal with TiCl3 in a NaCl flux.[7] This species adopts a linear chain structure wherein again the Ti(II) centers are octahedral with terminal, axial halides.[8]

References

  1. ^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 491. ISBN 0-8493-0594-2 
  2. ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
  3. ^ Gal'perin, E. L.; Sandler, R. A. (1962). "TiCI2". Kristallografiya 7: 217–19.. 
  4. ^ Baenziger, N. C.; Rundle, R. E. (1948). "TiCI2". Acta Cryst. 1 (5): 274–274. doi:10.1107/S0365110X48000740. 
  5. ^ Girolami, G. S.; Wilkinson, G.; Galas, A. M. R.; Thornton-Pett, M.; Hursthouse, M. B. (1985). "Synthesis and properties of the divalent 1,2-bis(dimethylphosphino)ethane (dmpe) complexes MCl2(dmpe)2 and MMe2(dmpe)2 (M = Ti, V, Cr, Mn, or Fe). X-Ray crystal structures of MCl2(dmpe)2 (M = Ti, V, or Cr), MnBr2(dmpe)2, TiMe1.3Cl0.7(dmpe)2, and CrMe2(dmpe)2". J. Chem. Soc., Dalton Transactions: 1339–1348. 
  6. ^ Jensen, J. A.; Wilson, S. R.; Schultz, A. J.; Girolami, G. S. (1987). "Divalent Titanium Chemistry. Synthesis, Reactivity, and X-ray and Neutron Diffraction Studies of Ti(BH4)2(dmpe)2 and Ti(CH3)2(dmpe)2". J. Am. Chem. Soc. 109 (26): 8094–5. doi:10.1021/ja00260a029. 
  7. ^ Hinz, D. J.; Dedecke, T.; Urland, W.; Meyer, G.. "Synthese, Kristallstruktur und Magnetismus von Natriumtetrachlorotitanat(lI), Na2TiCI4". ZAAC 620: 801–804. 
  8. ^ Jongen, L.; Gloger, T.; Beekhuizen, J. and Meyer, G. (2005). "Divalent titanium: The halides ATiX3 (A = K, Rb, Cs; X = Cl, Br, I)". ZAAC 631 (2–3): 582–586. doi:10.1002/zaac.200400464. 

Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Titanium(III) chloride — β TiCl3 viewed along the chains …   Wikipedia

  • titanium(IV) chloride — titano(IV) chloridas statusas T sritis chemija formulė TiCl₄ atitikmenys: angl. titanium tetrachloride; titanium(IV) chloride rus. титан четыреххлористый; титана тетрахлорид; титана(IV) хлорид ryšiai: sinonimas – titano tetrachloridas …   Chemijos terminų aiškinamasis žodynas

  • titanium(III) chloride — titano(III) chloridas statusas T sritis chemija formulė TiCl₃ atitikmenys: angl. titanium trichloride; titanium(III) chloride rus. титан треххлористый; титана трихлорид; титана(III) хлорид ryšiai: sinonimas – titano trichloridas …   Chemijos terminų aiškinamasis žodynas

  • Titanium tetrachloride — IUPAC name Titanium tetrachloride …   Wikipedia

  • Titanium chloride — may refer to: *Titanium(II) chloride *Titanium(III) chloride *Titanium(IV) chloride …   Wikipedia

  • Titanium — This article is about the chemical element. For other uses, see Titanium (disambiguation). scandium ← titanium → vanadium …   Wikipedia

  • titanium tetrachloride — titano(IV) chloridas statusas T sritis chemija formulė TiCl₄ atitikmenys: angl. titanium tetrachloride; titanium(IV) chloride rus. титан четыреххлористый; титана тетрахлорид; титана(IV) хлорид ryšiai: sinonimas – titano tetrachloridas …   Chemijos terminų aiškinamasis žodynas

  • titanium trichloride — titano(III) chloridas statusas T sritis chemija formulė TiCl₃ atitikmenys: angl. titanium trichloride; titanium(III) chloride rus. титан треххлористый; титана трихлорид; титана(III) хлорид ryšiai: sinonimas – titano trichloridas …   Chemijos terminų aiškinamasis žodynas

  • titanium processing — Introduction       preparation of the ore for use in various products.       Titanium (Ti) is a soft, ductile, silvery gray metal with a melting point of 1,675° C (3,047° F). Owing to the formation on its surface of an oxide film that is… …   Universalium

  • titanium — /tuy tay nee euhm/, n. Chem. a dark gray or silvery, lustrous, very hard, light, corrosion resistant, metallic element, occurring combined in various minerals: used in metallurgy to remove oxygen and nitrogen from steel and to toughen it. Symbol …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”