Boron sulfide

Names
IUPAC name

Boron sulfide

Other names

Boron sesquisulfide, Diboron trisulfide

Identifiers

CAS Number

* 12007-33-9 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 23349327

EC Number |

* 234-504-9

PubChem CID

* 123269

InChI

* InChI=1S/B2S3/c3-1-5-2-4

Key: ZVTQDOIPKNCMAR-UHFFFAOYSA-N

SMILES

* S=BSB=S

Properties

Chemical formula

| B2S3
Molar mass | 117.80 g/mol
Appearance  | colorless crystals
Density | 1.55 g/cm3, solid
Melting point |  563 °C (1,045 °F; 836 K)
Boiling point | decomposes at high T

Solubility in water

| decomposes
Solubility | soluble in ammonia
Structure

Crystal structure

| monoclinic, mP40, SpaceGroup = P21/c, No. 14

Coordination geometry

| B: planar, sp2
Thermochemistry

Heat capacity (C)

| 111.7 J/mol K

Std molar
entropy (S ~~o~~ 298)

| 327 J/mol K

Std enthalpy of
formation (ΔfH⦵298)

| −240.6 kJ/mol
Hazards
Main hazards | source of H2S
Safety data sheet | trc-canada.com
GHS pictograms |
GHS Signal word | Danger

GHS hazard statements

| H225, H260, H311, H301, H318, H315, H335

GHS precautionary statements

| P210, P280, P303+361+353, P231+232, P223, P402+404, P302+352, P312, P305+351+338, P405
NFPA 704 (fire diamond)  |

[1]

Flash point |  18 °C (64 °F; 291 K)
Related compounds

Related compounds

| BCl3
Lawesson's reagent

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

Y verify (what is YN ?)
Infobox references

Boron sulfide is the chemical compound with the formula B2S3. It is a white, moisture-sensitive solid. It has a polymeric structure. The material has been of interest as a component of "high-tech" glasses and as a reagent for preparing organosulfur compounds. It is the parent member of the thioborates.

## Reactions

Like the sulfides of silicon and phosphorus, B2S3 reacts with traces of water, including atmospheric moisture to release H2S. This hydrolysis is described by the following idealized equation:

3 \+ 3 H
2O → B

3 \+ 3 H

B2S3 readily forms glasses when blended with other sulfides such as P4S10. Such glasses do not absorb mid-frequencies of Infra-red energy relative to conventional borosilicate glasses. Some of these ternary phases that are fast ion conductors.[2]

B2S3 converts ketones into the corresponding thiones. For example, the conversion of benzophenone to its thione proceeds as follows:

3 \+ 3 (C

2C=O → B

3 \+ 3 (C

2C=S

In practice, B2S3 would be used in excess.[3]

## Synthesis

An early synthesis involved the reaction of iron and manganese borides with hydrogen sulfide at temperatures of 300 °C. The conversion is shown for the monoborides in the following idealized equation:[4]

2 FeB + 4 H
2S → B

3 \+ FeS + 4 H

The first synthesis was done by Jöns Jakob Berzelius in 1824 by direct reaction of amorphous boron with sulfur vapor.[5]

2 B + 3 S → B2S3

Another synthesis was favoured by Friedrich Wöhler and Henri Etienne Sainte-Claire Deville first published in 1858, starting from boron and hydrogen sulfide.[6]Cite error: Closing `</ref>` missing for `<ref>` tag The molecular, monomeric, form of B2S3 has a planar V shape with the central B-S-B angle of approximately 120°.[7]

## References

1. ↑ Material Safety Data Sheet, VWR, 2010, https://us.vwr.com/assetsvc/asset/en_US/id/8148576/contents, retrieved November 11, 2023
2. ↑ Kincs, Joseph; Martin, Steve W. (1996). "Non-Arrhenius Conductivity in Glass: Mobility and Conductivity Saturation Effects". Physical Review Letters 76 (1): 70–73. doi:10.1103/physrevlett.76.70. PMID 10060436. Bibcode: 1996PhRvL..76...70K. https://lib.dr.iastate.edu/mse_pubs/67.
3. ↑ Sato, R. (2004). L. Paquette. ed. Encyclopedia of Reagents for Organic Synthesis. New York: J. Wiley & Sons. doi:10.1002/047084289X.rb255. ISBN 0471936235.
4. ↑ Hoffmann, J. (1908). "Synthese von Borsulfid aus Ferro- und Manganbor". Zeitschrift für anorganische Chemie 59 (1): 127–135. doi:10.1002/zaac.19080590116. https://zenodo.org/record/1428114.
5. ↑ Berzelius, J. (1824). "Undersökning af flusspatssyran och dess märkvärdigaste föreningar". Kongliga Vetenskaps-Academiens Handlingar [Proceedings of the Royal Science Academy] 12: 46–98. https://books.google.com/books?id=pJlPAAAAYAAJ&pg=PA46.
Reprinted in German as:
Berzelius, J. J. (1824). "Untersuchungen über die Flußspathsäure und deren merkwürdigsten Verbindungen". Annalen der Physik und Chemie 78 (10): 113–150. doi:10.1002/andp.18240781002. Bibcode: 1824AnP....78..113B. http://gallica.bnf.fr/ark:/12148/bpt6k150878/f123.image.r=Annalen der Physic.langEN. see especially pages 145–147.
6. ↑ Wöhler, F.; Deville, H. E. S.-C. (1858). "Neue Beobachtungen über das Bor und einige seiner Verbindungen". Liebigs Annalen der Chemie und Pharmacie 105 (1): 67–73. doi:10.1002/jlac.18581050109. https://books.google.com/books?id=muE2AAAAYAAJ&pg=PA67.
7. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `G&E`

* v
* t
* e

Boron compounds

* BAs
* BBr3
* BCl3
* BF
* BF3
* BI3
* BN
* B(NO3)3
* B(OH)3
* BP
* BPO4
* B2F4
* B2Cl4
* B2H6
* BH3NH3
* B2O
* B2O3
* B2S3
* B4C
* B6O
* B5H9
* B5H11
* B6H10
* B6H12
* B10H14

* v
* t
* e

Sulfides

| H2S
H2S2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | He

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Li2S | BeS |  |  |  |  |  |  |  |  |  |  | B2S3 | CS2
COS | (NH4)SH | O | F | Ne
Na2S
Na2Sx | MgS |  |  |  |  |  |  |  |  |  |  | Al2S3 | SiS
SiS2 | PxSy | S | Cl | Ar
K2S | CaS | Sc2S3 | TiS2 | V | CrS
Cr2S3 | MnS
MnS2 | FeS
Fe3S4 | CoS | NiS | Cu2S
CuS | ZnS | GaS
Ga2S3 | GeS
GeS2 | As2S3
As4S3 | SeS2 | Br | Kr
Rb2S | SrS | Y2S3 | ZrS2 | NbS2 | MoS2 | Tc | Ru | Rh2S3 | PdS | Ag2S | CdS | In2S3 | SnS
SnS2 | Sb2S3
Sb2S5 | TeS2 | I | Xe
Cs2S | BaS | *  | HfS2 | TaS2 | WS2
WS3 | ReS2
Re2S7 | Os | Ir2S3
IrS2 | PtS
PtS2 | Au2S
Au2S3 | HgS | Tl2S | PbS
PbS2 | Bi2S3 | Po | At | Rn
Fr | Ra | **  | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og |  |  |  |  |  |  |  |
|  | ↓ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| * | La2S3 | CeS
Ce2S3 | Pr2S3 | Nd2S3 | Pm2S3 | SmS
Sm2S3 | Eu2S3 | Gd2S3 | Tb2S3 | Dy2S3 | Ho2S3 | Er2S3 | Tm2S3 | Yb2S3 | Lu2S3 |
| ** | Ac | ThS2 | Pa | US2 | Np | Pu | Am | Cm | Bk | Cf | Es | Fm | Md | No | Lr |

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*[CID]: Compound ID
*[H225]: Highly flammable liquid and vapour
*[H260]: In contact with water releases flammable gases which may ignite spontaneously
*[H311]: Toxic in contact with skin
*[H301]: Toxic if swallowed
*[H318]: Causes serious eye damage
*[H315]: Causes skin irritation
*[H335]: May cause respiratory irritation
*[P210]: Keep away from heat/sparks/open flames/hot surfaces – No smoking
*[P280]: Wear protective gloves/protective clothing/eye protection/face protection
*[P303+361+353]: IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower
*[P231+232]: Handle under inert gas. Protect from moisture
*[P223]: Keep away from any possible contact with water, because of violent reaction and possible flash fire
*[P402+404]: Store in a dry place. Store in a closed container
*[P302+352]: IF ON SKIN: Wash with soap and water
*[P312]: Call a POISON CENTER or doctor/physician if you feel unwell
*[P305+351+338]: IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do – continue rinsing
*[P405]: Store locked up
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