Search results
Results from the WOW.Com Content Network
Structure of a rare monomeric boron hydride, R = i-Pr. [4] The most-studied class of organoboron compounds has the formula BR n H 3−n. These compounds are catalysts, reagents, and synthetic intermediates. The trialkyl and triaryl derivatives feature a trigonal-planar boron center that is typically only weakly Lewis acidic.
Triethylborane is strongly pyrophoric, with an autoignition temperature of −20 °C (−4 °F), [13] burning with an apple-green flame characteristic for boron compounds. Thus, it is typically handled and stored using air-free techniques.
A borane is a compound with the formula BR x H y although examples include multi-boron derivatives. A large family of boron hydride clusters is also known. In addition to some applications in organic chemistry , the boranes have attracted much attention as they exhibit structures and bonding that differs strongly from the patterns seen in ...
The general structure of a boronic acid, where R is a substituent.. A boronic acid is an organic compound related to boric acid (B(OH) 3) in which one of the three hydroxyl groups (−OH) is replaced by an alkyl or aryl group (represented by R in the general formula R−B(OH) 2). [1]
Pentaborane(9) is an inorganic compound with the formula B 5 H 9.It is one of the most common boron hydride clusters, although it is a highly reactive compound.Because of its high reactivity with oxygen, it was once evaluated as rocket or jet fuel.
Triethyloxonium tetrafluoroborate is prepared from boron trifluoride, diethyl ether, and epichlorohydrin: [5] 4 Et 2 O·BF 3 + 2 Et 2 O + 3 C 2 H 3 OCH 2 Cl → 3 [Et 3 O] + [BF 4] − + B(OCH(CH 2 Cl)CH 2 OEt) 3. where the Et stands for ethyl. The trimethyloxonium salt is available from dimethyl ether via an analogous route. [6]
Low-energy σ-donation orbitals from the base to boron are present in these compounds, and the π-interaction from boron's lone pair to the Lewis base serves as the HOMO. Calculated electronic structure for a number of borylene complexes were compared with their isoelectronic homologues: carbone complexes (CL 2 ) and nitrogen cation complexes ...
The structure and bonding in Al 2 R 6 and diborane are analogous (R = alkyl). Referring to Al 2 Me 6, the Al-C(terminal) and Al-C(bridging) distances are 1.97 and 2.14 Å, respectively. The Al center is tetrahedral. [6] The carbon atoms of the bridging ethyl groups are each surrounded by five neighbors: carbon, two hydrogen atoms and two ...