16883-45-7

Basic information

• Product Name: Tetramethylammonium borohydride
• Synonyms: Ammonium, tetramethyl-, tetrahydroborate(1-);Methanaminium, N,N,N-trimethyl-, tetrahydroborate(1-);Nsc164901;Tetra-methyl ammonium boron hydride;Tetramethylammonium tetrahydroborate(1-);Tetramethylammonium borohydride,TMAB;TetraMethylaMMoniuM borohydride 95%;Tetramethylammonium Borohydride
• CAS NO: 16883-45-7
• Molecular Formula: BH₄*C₄H₁₂N
• Molecular Weight: 88.99
• EINECS: 240-917-5
• Product Categories: Quaternary Ammonium Compounds;Reduction;Synthetic Organic Chemistry;Tetrahydroborates;metal hydrides;Ammonium Polyhalides, etc. (Quaternary);B (Classes of Boron Compounds)
• Mol File: 16883-45-7.mol
• Article Data: 15

Chemical Properties

• Melting Point: 150°C (dec.)
• Appearance: white/crystal
• Density: 0,813 g/cm3
• Storage Temp.: 2-8°C
• Water Solubility: almost transparency in Water
• Sensitive: Moisture Sensitive
• BRN: 3684968
• CAS DataBase Reference: Tetramethylammonium borohydride(CAS DataBase Reference)
• NIST Chemistry Reference: Tetramethylammonium borohydride(16883-45-7)
• EPA Substance Registry System: Tetramethylammonium borohydride(16883-45-7)

Safety Data

• Hazard Codes: F,T,Xi
• Statements: 15-25-36/38-36/37/38
• Safety Statements: 26-36/37/39-43-45-36
• RIDADR: UN 3134 4.3/PG 2
• WGK Germany: 3
• RTECS: BS8310000
• TSCA: Yes
• HazardClass: 4.3
• PackingGroup: I
• Hazardous Substances Data: 16883-45-7(Hazardous Substances Data)

Usage

Uses

Reactant for:Preparation of iridium tetrahydride complexes bearing a tridentate pincer-type bis(phosphino)silyl ligandReduction reactions (reducing agent)

Purification Methods

Recrystallisation of the borohydride from H2O three times yields ca 94% pure compound. Dry in high vacuum at 100o for 3hours. The solubility in H2O is 48% (20o), 61% (40o), and in EtOH 0.5% (25o) and MeCN 0.4% (25o). It decomposes slowly in a vacuum at 150o, but rapidly at 250o. The rate of hydrolysis of Me4N.BH4 (5.8M) in H2O at 40o is constant over a period of 100hours at 0.04% of original wt/hour. The rate decreases to 0.02%/hour in the presence of Me4NOH (5% of the wt of Me4N.BH4). [Banus et al. J Am Chem Soc 74 2346 1952, Beilstein 4 IV 148.]

InChI:InChI=1/C4H12N.B/c1-5(2,3)4;/h1-4H3;/q+1;-1

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