Tricarbon monosulfide

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Tricarbon monosulfide
Names
Preferred IUPAC name
3-Sulfanylidenepropa-1,2-dien-1-ylidene
Other names
Tricarbon sulfur
Identifiers
3D model (
JSmol
)
ChemSpider
  • InChI=1S/C3S/c1-2-3-4
    Key: DYOPWGBKIHJGRG-UHFFFAOYSA-N
  • [CH0]=C=C=S
Properties
C3S
Molar mass 68.09 g·mol−1
Related compounds
dicarbon monosulfide
carbon monosulfide
carbon disulfide
Related compounds
 tricarbon monoxide

carbon subnitride

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Tricarbon monosulfide (C3S) or tricarbon sulfur[1] is a reactive molecular substance that has been detected in outer space. Tricarbon monosulfide is a heterocumulene or thiocumulene, consisting of a straight chain of three carbon atoms and a terminal sulfur atom.[2]

Properties

The dipole moment of tricarbon monosulfide is 3.704 debye. The bond lengths are 1.275 Å, for terminal C=C bond, 1.292 Å for internal bond, and 1.535 Å for the C=S bond. The similar bond lengths between the carbon atoms indicate they each have a double bond nature.[2] The rotational constants for 12C12C12C32S are B0 = 2890.38000 MHz and D0 = 0.00022416.[3]

There is a characteristic infrared absorption band at 2047.5 cm−1 due to stretching of a C=C bond.[1]

Formation

Along with the related

Taurus molecular cloud 1.[4][3] Maximal concentrations occurred with a carbon disulfide pressure of 0.02 torr
.

In molecular clouds, the formation mechanism is speculated to be CCS + CH → CCCS + H.[5]

On dust grains, in space the formation mechanism is theorised to be: CCC + H2S → C3•HSH → CCCS + H2 when irradiated with visible or UV light. THis reaction has been reproduced in a solid argon matrix.[1]

Natural occurrence

Tricarbon monosulfide has been detected in

IRC+10216.[7]

References

  1. ^
    PMID 25429945
    .
  2. ^ a b c d Etim, E. E.; Onudibia, M. E.; Asuquo, J. E.; Ukafia, O. P.; Andrew, C.; Ushie, O. A. (April 2017). "Interstellar C3S: Different Dipole Moment, Different Column Density, Same Astronomical Source" (PDF). FUW Trends in Science & Technology Journal. 2 (1B): 574–577.
  3. ^
    doi:10.1086/184924
    .
  4. doi:10.1086/184923
    .
  5. doi:10.1086/518595
    .
  6. ^
    S2CID 119251515
    .
  7. doi:10.1086/187088
    .
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