Search results
Results from the WOW.Com Content Network
An important synthetic application using such dialkylboranes, such as diethylborane, is the transmetallation of the organoboron compounds to form organozinc compounds. [9] [10] Some diaryl and dialkylboranes are well known. Dimesitylborane is a dimer (C 6 H 2 Me 3) 4 B 2 H 2). It reacts only slowly with simple terminal alkenes.
Borate ions occur, alone or with other anions, in many borate and borosilicate minerals such as borax, boracite, ulexite (boronatrocalcite) and colemanite. Borates also occur in seawater, where they make an important contribution to the absorption of low frequency sound in seawater. [1] Borates also occur in plants, including almost all fruits. [2]
At the age of 21, he left Wisconsin to prospect for mineral wealth in the American West, starting in Nevada. [4]In 1872, while contracting to provide firewood to a small borax operation at nearby Columbus Marsh, Smith discovered a rich supply of ulexite at Teels Marsh in Mineral County, Nevada, east of Mono Lake, near the town he would found ten years later, Marietta, Nevada, while looking ...
Unlike silicates, boron minerals never contain boron with coordination number greater than four. A typical motif is exemplified by the tetraborate anions of the common mineral borax, shown at left. The formal negative charge of the tetrahedral borate center is balanced by metal cations in the minerals, such as the sodium (Na +) in borax. [1]
When the Storey brothers' interests were subsequently acquired in 1873, the name was shortened to Smith Brothers Borax Co. A few years later (circa 1884) it was changed again to Teel's Marsh Borax Co. In 1880, the separate and previously existing Pacific Borax Company (with no "Coast" in the name) was acquired by Smith. Frank Smith also ...
Applications [ edit ] The tetrapropylboranuide anion is a reagent for the propylation of organometallic compounds, including organotin , organomercury , and organolead compounds of interest to environmental and public health research. [ 4 ]
The Borate Minerals are minerals which contain a borate anion group. The borate (BO 3) units may be polymerised similar to the SiO 4 unit of the silicate mineral class. This results in B 2 O 5, B 3 O 6, B 2 O 4 anions as well as more complex structures which include hydroxide or halogen anions. [2] The [B(O,OH) 4] − anion exists as well.
Trimethyl borate is the organoboron compound with the formula B(OCH 3) 3 and a metal alkoxide. It is a colourless liquid that burns with a green flame. [1] It is an intermediate in the preparation of sodium borohydride and is a popular reagent in organic chemistry. It is a weak Lewis acid (AN = 23, Gutmann-Beckett method). [2]