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[10] The spectrum of boron monohydride includes a molecular band for the lowest electronic transition X 1 Σ + → A 1 Π with a band head at 433.1 nm (for 0→0) and 437.1 (for 0→1) [3] The spectrum contains P, Q, and R branches. [10] Although BH is a closed shell molecule, it is paramagnetic independent of temperature. [11]
In 2004, the team at the Institute of Modern Physics (IMP), Lanzhou, have studied the nuclear reaction between americium-243 targets and accelerated nuclei of magnesium-26 in order to synthesise the new isotope 265 Bh and gather more data on 266 Bh: 243 95 Am + 26 12 Mg → 269−x 107 Bh + x n (x = 3, 4, or 5)
BH) max can be graphically defined as the area of the largest rectangle that can drawn in the second quadrant of the B-H loop. The maximum energy product is defined based on the magnetic hysteresis saturation loop ( B - H curve), in the demagnetizing portion where the B and H fields are in opposition.
264 Bh, 265 Bh, 266 Bh, and 271 Bh are more stable at around 1 s, and 267 Bh and 272 Bh have half-lives of about 10 s. The heaviest isotopes are the most stable, with 270 Bh and 274 Bh having measured half-lives of about 2.4 min and 40 s respectively, and the even heavier unconfirmed isotope 278 Bh appearing to have an even longer half-life of ...
Ball-and-stick model of the tetrahydroborate anion, [BH 4] −. Borohydride refers to the anion [B H 4] −, which is also called tetrahydridoborate, and its salts. [1] Borohydride or hydroborate is also the term used for compounds containing [BH 4−n X n] −, where n is an integer from 0 to 3, for example cyanoborohydride or cyanotrihydroborate [BH 3 (CN)] − and triethylborohydride or ...
Sodium triacetoxyborohydride, also known as sodium triacetoxyhydroborate, commonly abbreviated STAB, is a chemical compound with the formula Na[(CH 3 COO) 3 BH]. Like other borohydrides, it is used as a reducing agent in organic synthesis. This colourless salt is prepared by protonolysis of sodium borohydride with acetic acid: [1]
Crystal structures of elements at their melting points at atmospheric pressure 1 H 13 K Mg: 2 He * 3 Li 453 K W: 4 Be 1560 K W: 5 B 2349 K β-B: 6 C 3800 K g-C: 7 N 63 K β-N
Disiamylborane (bis(1,2-dimethylpropyl)borane) is an organoborane with the formula [((CH 3) 2 CHCH(CH 3)) 2 BH] 2 (abbreviation: Sia 2 BH). It is a colorless waxy solid that is used in organic synthesis for hydroboration–oxidation reactions. Like most dialkyl boron hydrides, it has a dimeric structure with bridging hydrides.