23940-20-7

Upstream product

• 873-51-8 phenylborondichloride 

Downstream Products

• 89462-13-5 Cs[μ-7,8-trimethylene-7,8-C2B9H10] 
• 7637-07-2 boron trifluoride 
• 13842-55-2 boron difluoride 
• 856409-07-9 [1,2-(CH₂)3-4,4-(PMe₂Ph)2-4,1,2-closo-PtC₂B₁₀H₁₀] 
• 856409-09-1 [1,2-(CH₂)3-4,4-(dppe)-4,1,2-closo-NiC₂B₁₀H₁₀] 
• 1403382-37-5 7,8-(CH2)3-μ-9,10,11-[2′-{1′,3′-[2′′,6′′-iPr2(C6H3)]2-1′,3′-N2C3H2}]BH-7,8-C2B9H11 

Relevant academic research and scientific papers

Synthesis, structure, and reactivity of 13-vertex carboranes and 14-vertex metallacarboranes

Syntheses, properties, and synthetic applications of 13-vertex closo- and nido-carboranes are reported. Reactions of the nido-carborane salt [(CH 2)3C2B10H10]Na 2 with dihaloborane reagents afforded 13-vertex closo-carboranes 1,2-(CH2)3-3-R-1,2-C2B10H 10 (R = H (2), Ph (3), Z-EtCH=C(Et) (4), E-tBuCH= CH (5)). Treatment of the arachno-carborane salt [(CH2)3C 2B10H10]Li4 with HBBr 2·SMe2 gave both the 13-vertex carborane 2 and a 14-vertex closo-carborane (CH2)3C2B 12H12 (8). On the other hand, the reaction of [C 6H4(CH2)2C2B 10H10]Li4 with HBBr2·SMe 2 generated only a 13-vertex closo-carborane 1,2-C6H 4(CH2)2-1,2-C2B11H 11 (9). Electrophilic substitution reactions of 2 with excess Mel, Br2, or I2 in the presence of a catalytic amount of AlCl3 produced the hexa-substituted 13-vertex carboranes 8,9,10,11,12,13-X6-1,2-(CH2)3-1,2-C 2B11H5 (X = Me (10), Br (11), I (12)). The halogenated products 11 and 12 displayed unexpected instability toward moisture. The 13-vertex closo-carboranes were readily reduced by groups 1 and 2 metals. Accordingly, several 13-vertex nido-carborane dianionic salts {nido-1,2-(CH 2)3-1,2-C2B11H11}{Li 2(DME)2-(THF)2} (13), [{nido-1,2-(CH 2)3-1,2-C2B11H11}{Na 2(THF)4}]n (13a), [{nido-1,2-(CH 2)3-3-Ph-1,2-C2B11H 10}-{Na2(THF)4}]n (14), [{nido-1,2-C6H4(CH2)2-1,2-C 2B11H11}{Na2(THF)4}] n (15), and {nido-1,2-(CH2)3-1,2-C 2B11H11}{M(THF)5} (M = Mg (16), Ca (17)) were prepared in good yields. These carbon-atom-adjacent nido-carboranes were not further reduced to the corresponding arachno species by lithium metal. On the other hand, like other nido-carborane dianions, they were useful synthons for the production of super-carboranes and supra-icosahedral metallacarboranes. Interactions of 13a with HBBr2·SMe2, (dppe)NiCl2, and (dppen)NiCl2 gave the 14-vertex carborane 8 and nickelacarboranes [η5-(CH2)3C 2B11H11]Ni(dppe) (18) and [η5- (CH2)3C2B11H11]Ni(dppen) (19), respectively. All complexes were fully characterized by various spectroscopic techniques and elemental analyses. Some were further confirmed by single-crystal X-ray diffraction studies.