Misplaced Pages

Osmium pentacarbonyl

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Osmium pentacarbonyl
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1S/5CO.Os/c5*1-2;Key: RLUHVGZGDXPTEM-UHFFFAOYSA-N
SMILES
  • C(=O)=(=C=O)(=C=O)(=C=O)=C=O
Properties
Chemical formula C5O5Os
Molar mass 330.28 g·mol
Appearance colorless liquid
Melting point 2–2.5 °C (35.6–36.5 °F; 275.1–275.6 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

Osmium pentacarbonyl is the organoosmium compound with the formula Os(CO)5. It is the simplest isolatable carbonyl complex of osmium. Osmium pentacarbonyl is a colorless volatile liquid that is obtained by treating solid triosmium dodecacarbonyl under 200 atmospheres of carbon monoxide at 280-290 °C. In contrast, also at 200 atm of CO, solid Ru3(CO)12 converts to Ru(CO)5 at milder temperature of 160 °C.

Reactions

Structure proposed for Os2(CO)9.

Samples of Os(CO)5 convert back to the trioosmium cluster upon heating to 80 °C. The analogous conversion of Ru(CO)5 back to Ru3(CO)12 occurs at room temperature. Chlorination of the pentacarbonyl gives a cationic pentacarbonyl complex:

Os(CO)5 + Cl2 → Cl

Upon UV irradiation, hexane solutions of the pentacarbonyl react with ethylene to give mono-, di-, and trisubstituted derivatives:

Os(CO)5 + n C2H4 → Os(CO)5-n(C2H4)n + n CO (n = 1,2,3)

References

  1. ^ Rushman, Paul; Van Buuren, Gilbert N.; Shiralian, Mahmoud; Pomeroy, Roland K. (1983). "Properties of the Pentacarbonyls of Ruthenium and Osmium". Organometallics. 2 (5): 693–694. doi:10.1021/om00077a026.
  2. Moss, John R.; Graham, William A. G. (1977). "The Enneacarbonyls of Ruthenium and Osmium". Journal of the Chemical Society, Dalton Transactions: 95. doi:10.1039/DT9770000095.
  3. Kiel, Gong Yu; Takats, Josef; Grevels, Friedrich Wielhelm (1987). "Multisubstitution of Os(CO)5 by ethylene: Isomeric Os(CO)2(C2H4)3 and a Derivative of Os(CO)(C2H4)4". Journal of the American Chemical Society. 109 (7): 2227–2229. doi:10.1021/ja00241a075.
Osmium compounds
Os(0)
Os(0,I)
Os(I)
Os(I,II)
Os(II)
Organoosmium(II) compounds
  • Os(C5H5)2
    • Os(III)
    Os(IV)
    Os(V)
    Os(VI)
    Os(VII)
    Os(VIII)
    Metal carbonyl complexes
    H2CO He
    Li Be2(CO)4 H3BCO C(CO)2
    (C=C)(CO)2
    (HC=CH)CO     		NCO OCO F2CO
    H(CO)F
    (FCO)2     		Ne
    Na Mg(O3)2(CO)2 Al Si PCO SCO Cl2CO
    (ClCO)2     		Ar
    K Ca(CO)8 Sc(CO)8 Ti(CO)7
    Ti(CO)6
    Cp2Ti(CO)2     		V(CO)6
    C5H5V(CO)4
    V(CO)6     		Cr(CO)6
    C6H6Cr(CO)3     		Mn2(CO)10
    Mn(CO)5     		Co2(CO)8
    Co4(CO)12
    Co(CO)4
    HC(Co(CO)3)3     		Ni(CO)4 (Cu(CO)Cl)n Zn Ga Ge As SeCO Br2CO Kr
    Rb Sr(CO)8 Y(CO)8 Zr Nb Mo(CO)6
    C7H8Mo(CO)3     		Tc2(CO)10
    Tc(CO)5     		Ru(CO)5
    Ru3(CO)12
    Ru(CO)4     		Rh4(CO)12
    Rh6(CO)16
    Rh2Cl2(CO)2     		Pd(CO)4 Cd In Sn Sb Te I Xe
    Cs Ba(CO)8 * Lu Hf Ta W(CO)6
    (C5H5)2W2(CO)6     		Re2(CO)10
    Re(CO)5     		Os(CO)5
    Os3(CO)12
    Os(CO)4
    Os3(CO)10     		Ir4(CO)12 Pt Au Hg Tl Pb Bi Po At Rn
    Fr Ra ** Lr Rf Db Sg(CO)6 Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
     
    * La(CO)8 Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb
    ** Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No
    Categories: