Diboron

Base Information

• Chemical Name: Diboron
• CAS No.: 19287-45-7
• Deprecated CAS: 1304-00-3,133441-46-0,16970-81-3,19287-88-8,849231-16-9
• Molecular Formula: B2H6
• Molecular Weight: 27.6696
• UNII: BS9K982N24
• DSSTox Substance ID: DTXSID501316665,DTXSID501335990
• Nikkaji Number: J3.252.583K
• Wikidata: Q3026498,Q26840888
• Mol file: 19287-45-7.mol

Synonyms:Borane;Boranes;Boron Hydride;Boron Hydrides;Hydride, Boron;Hydrides, Boron

Chemical Property of Diboron

Chemical Property:

• Melting Point: -165 ºC
• Boiling Point: -93 ºC
• Flash Point: -90 ºC
• PSA: 0.00000
• Density: 0.477
• LogP: -1.83240
• Water Solubility.: Decomposes
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 0
• Rotatable Bond Count: 0
• Exact Mass: 22.0186103
• Heavy Atom Count: 2
• Complexity: 8

Purity/Quality:

Safty Information:

• Hazard Codes: F+;T,T,F+,T+
• Statements: 12-23/24/25-36/37/38-26
• Safety Statements: 9-16-36/37/39-45-36/37-28

MSDS Files:

Total 1 MSDS from other Authors

Useful:

• Canonical SMILES: B#B
• Description: Diborane is a colorless gas at room temperature and atmospheric pressure. It has an unpleasant, distinctive, sickly sweet odor. Diborane is a highly flammable gas that forms a flammable mixture with air over a range of 0.9 percent to 98 percent diborane (at 1 atm). Diborane bums in air (or oxygen) with a blue to green flame. Diborane is considered pyrophoric at room temperature. The gas is easily ignited by a spark or the heat of reaction with moisture in air. Pure diborane is insensitive to mechanical shock; however, shock and thermally sensitive mixtures may be formed in the presence of impurities such as oxygen, water, halogenated hydrocarbons, and so on. Thermal decomposition of diborane to hydrogen can result in excessive pressure buildup. Vessels for containment of diborane should be designed to contain such resultant decomposition pressure.
• Uses: Diborane is used as a rocket propellant, in thevulcanization of rubber, as a polymerizationcatalyst, as a reducing agent, in the synthesisof trialkyl boranes, and as a doping agent(Merck 1996). Diborane is commonly used in the electronics industry for semiconductor doping by mixing small concentrations with silane in the gas phase prior to decomposition. When reacted with silane and oxygen, diborane also produces the cladding layers of wave guides for fiber optics by chemical vapor deposition. Other uses of diborane include the preparation of boron nitride by the reaction of diborane with ammonia, as a catalyst for polymerization, and for the conversion of olefins to trialkyl boranes. It is also used in the conversion of amines to amine boranes and as a selective reducing agent with carbonyl compounds such as aldehydes and ketones to form alcohols. As catalyst for olefin polymerization; as rubber vulcanizer; as reducing agent; as flame-speed accelerator; in rocket propellants; in intermediate in preparation of the boron hydrides; in conversion of olefins to trialkylboranes and primary alcohols; as a doping gas.

Technology Process of Diboron

There total 468 articles about Diboron which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 94.0%

sodium tetrahydroborate (16940-66-2) + aluminium trichloride (7446-70-0) + BF3-triglymate → aluminum(III) fluoride (7784-18-1) + sodium chloride (7647-14-5) + diborane (19287-45-7)

Guidance literature:

In further solvent(s); soln. NaBH4 in triglyme was added slowly for 2-3 h at room temp. to BF3-triglyme, AlCl3 in triglyme; B2H6 was absorbed with THF;

DOI:10.1021/ic0000911

Reference yield: 94.0%

sodium tetrahydroborate (16940-66-2) + aluminium trichloride (7446-70-0) + BF3-tetraglymate → aluminum(III) fluoride (7784-18-1) + sodium chloride (7647-14-5) + diborane (19287-45-7)

Guidance literature:

In further solvent(s); soln. NaBH4 in triglyme was added slowly for 2-3 h at room temp. to BF3-tetraglyme, AlCl3 in triglyme; B2H6 was absorbed with THF;

DOI:10.1021/ic0000911

Reference yield: 90.0%

sodium tetrahydroborate (16940-66-2) + sodium tetrafluoroborate (13755-29-8) + aluminium trichloride (7446-70-0) → aluminum(III) fluoride (7784-18-1) + sodium chloride (7647-14-5) + diborane (19287-45-7)

Guidance literature:

In further solvent(s); soln. NaBH4 in triglyme (tetraglyme) was added slowly for 2-3 h at roomtemp. to NaBF4 and AlCl3 in triglyme (tetraglyme); B2H6 was absorbed with THF;

DOI:10.1021/ic0000911

upstream raw materials:

sodium tetrahydroborate

iodine

boron trifluoride diethyl etherate

sodium hydride

Downstream raw materials:

N,N-diethylaniline borane

boron triiodide

ethyl iodide

hydrogen

Refernces

• 1、 Weiss, H. G.,Shapiro, I.. "". . p. 6167 - 6168. Retrieved 1959.
• 2、 Chen, Xi-Meng,Ma, Nana,Zhang, Qian-Fan,Wang, Jin,Feng, Xiaoge,Wei, Changgeng,Wang, Lai-Sheng,Zhang, Jie,Chen, Xuenian. "Elucidation of the Formation Mechanisms of the Octahydrotriborate Anion (B3H8-) through the Nucleophilicity of the B-H Bond". . p. 6718 - 6726. Retrieved 2018.
• 3、 Pianalto,Bopegedera,Fernando,Hailey,O'Brien,Brazier,Keller,Bernath. "Gas-phase inorganic chemistry: Laser spectroscopy of calcium and strontium monoborohydrides". . p. 7900 - 7903. Retrieved 1990.
• 4、 Andrews, Lester,Wang, Xuefeng. "Infrared spectrum of the novel electron-deficient BH4 radical in solid neon". . p. 7280 - 7281. Retrieved 2002.
• 5、 Titov,Zhemchugova. "Reactions of tetraalkylammonium octahydrotriborates with aluminum tetrahydroborate". . p. 724 - 725. Retrieved 1998.
• 6、 Shepp, A.,Bauer, S. H.. "". . p. 265 - 270. Retrieved 1954.
• 7、 Drake, J. E.,Simpson, J.. "". . p. 87 - 92. Retrieved 1967.
• 8、 Ryschkewitsch,Miller. "". . p. 6258. Retrieved 1975.
• 9、 Elliot, J. R.,Boldebuck, E. M.,Roedel, G. F.. "". . p. 5047 - 5052. Retrieved 1952.
• 10、 Wickham-Jones, C. Tom,Moran, Sean,Ellison, G. Barney. "Photoelectron spectroscopy of BH3-". . p. 795 - 806. Retrieved 1989.