| | Identification | Back Directory |  | [Name] 
 Tetramethylammonium borohydride
 |  | [CAS] 
 16883-45-7
 |  | [Synonyms] 
 TMAB
 Nsc164901
 BISMUTH(III) SUBNITRATE  98%
 tetramethylammoniumborohydrate
 TETRAMETHYLAMMONIUM BOROHYDRIDE
 Tetramethylammoniumborohydride,95%
 Tetra-methyl ammonium boron hydride
 TetraMethylaMMoniuM borohydride 95%
 Tetramethylammonium Borohydride 
 tetramethylammonium tetrahydroborate
 Tetramethylammonium borohydride,TMAB
 TETRAMETHYLAMMONIUM TETRAHYDRIDOBORATE
 tetramethyl-ammoniutetrahydroborate(1-)
 Tetramethylammonium tetrahydroborate(1-)
 Ammonium, tetramethyl-, tetrahydroborate(1-)
 n,n,n-trimethylmethanaminiumtetrahydroborate(1-)
 n,n,n-trimethyl-methanaminiutetrahydroborate(1-)
 Tetramethylammonium Borohydride [Reducing Reagent]
 Methanaminium, N,N,N-trimethyl-, tetrahydroborate(1-)
 |  | [EINECS(EC#)] 
 240-917-5
 |  | [Molecular Formula] 
 C4H16BN
 |  | [MDL Number] 
 MFCD00011778
 |  | [MOL File] 
 16883-45-7.mol
 |  | [Molecular Weight] 
 88.99
 | 
 | Hazard Information | Back Directory |  | [Uses] 
 Reactant for:
 
 Preparation of iridium tetrahydride complexes bearing a tridentate pincer-type bis(phosphino)silyl ligandReduction reactions (reducing agent)
 |  | [reaction suitability] 
 reagent type: reductant
 |  | [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.]
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