Chapter 2 details the use of Me2S·BHn(C6F5)3−n in the preparation of the pentafluorophenyl substituted amine borane adducts, LB·BHn(C6F5)3−n (LB = NR3, NHR2, NH2R, py). (uea.ac.uk)
The related pentafluorophenyl substituted amine boranes H3N·BHn(C6F5)3−n may be used as ligand precursors for the synthesis of group 4 metallocene amidoborane complexes. (uea.ac.uk)
Tris(pentafluorophenyl)borane (CAS# 1109-15-5) is a useful research chemical, used as a catalyst in the metal-free catalytic reductive cleavage of enol ethers via proposed mechanism of tandem hydrosilylation and silicon-assisted β-elimination. (chemicalbook.com)
Tris(pentafluorophenyl)borane also appears as an ancillary ligand in luminescent isocyano Rh(I) complexes. (chemicalbook.com)
Tris(pentafluorophenyl)borane is used as an excellent activator component in homogeneous Ziegler-Natta chemistry. (chemicalbook.com)
Catalytic studies indicate that BoCb3 is a superior catalyst for promoting C−F bond functionalization reactions than tris(pentafluorophenyl)borane [B(C6F5)3]. (edu.au)
In this month's Editor's Collection, Associate Editor Santanu Mukherjee highlighted 'Tris(pentafluorophenyl)borane Catalyzed C−C and C−heteroatom Bond Formation' by Chatterjee et al. (rsc.org)
Tris2
The catalytic activity of tris(3,4,5-trifluorophenyl)borane has been explored in the 1,2-hydroboration reactions of unsaturated substrates. (rsc.org)
The synthesis of tris(ortho-carboranyl)borane (BoCb3), a single site neutral Lewis superacid, in one pot from commercially available materials is achieved. (edu.au)
Adducts7
The high fluoride ion affinity (FIA) confirms its classification as a Lewis superacid and the Gutmann-Beckett method as well as adducts with Lewis bases indicate stronger Lewis acidity over the widely used fluorinated aryl boranes. (edu.au)
We performed DFT calculations on the structures of mesomeric betaine 22a , the carbene 23a , and the mechanisms of the borane adduct formation to 26a - h , NMR spectroscopic investigations including 15 N, 7 Li, and 11 B NMR spectroscopy, and an X-ray single-crystal analysis of one of the borane adducts. (figshare.com)
The stability of a variety of borane (BH 3 and BH 2 NHMe) and silane (SiH n Ph 4- n , n = 0-4) adducts with diamino (NHC) and aminoalkyl (CAAC) carbenes has been carefully examined using M06-2X/cc-pVDZ computations, including natural bond orbital and atoms-in-molecules analyses. (ualberta.ca)
Duward Shriver pioneered the study of borane adducts of cyanometalates. (rsc.org)
1a-d Although he established from analysis of vibrational spectroscopic data that borane coordination (CN-BR 3 ) enhanced M(d 6 )-CN π backbonding, surprisingly, to the best of our knowledge, no structures of d 6 low-spin borane adducts have been hitherto reported. (rsc.org)
3,4 Also surprising is that very little is known about the electrochemistry of coordinatively-saturated borane adducts of hexacyanometalates, with the majority of previous work focused on the solvent dependence of cyanometalate redox potentials. (rsc.org)
The borane adducts of 1 were synthesized by combining six equivalents of borane with one equivalent of 1 dissolved in dichloromethane (DCM) in a nitrogen-filled glove box. (rsc.org)
Ammonia12
Ammonia borane (AB) is a chemical hydride being investigated widely for its potential to realize the hydrogen economy. (purdue.edu)
The as-prepared M/TiO2-MR possessed higher catalytic activities in the hydrolysis of ammonia borane than those prepared by the batch method, which could be ascribed to smaller noble metal nanoparticles, exposing more active sites. (authorea.com)
Solid-state 1 H- 14 N OT HMQC, 11 B MQMAS and 1 H- 11 B HETCOR NMR experiments are used to explore the role of homopolar B-B interaction in the thermal dehydrogenation of pure and supported ammonia borane, for it's potential hydrogen storage applications. (edu.au)
Among them, ammonia-borane appears to be a promising candidate due to its high gravimetric hydrogen storage capacity. (metu.edu.tr)
Ammonia-borane can release hydrogen on hydrolysis in aqueous solution under mild conditions in the presence of a suitable catalyst. (metu.edu.tr)
Herein, we report the synthesis of ruthenium(0) nanoparticles stabilized by dihydrogenphosphate anions with an average particle size of 2.9 +/- 0.9 nm acting as a water-dispersible nanocatalyst in the hydrolysis of ammonia-borane. (metu.edu.tr)
They provide an initial turnover frequency (TOF) value of 80 min(-1) in hydrogen generation from the hydrolysis of ammonia-borane at room temperature. (metu.edu.tr)
Moreover, the high stability of these ruthenium(0) nanoparticles makes them long-lived and reusable nanocatalysts for the hydrolysis of ammonia-borane. (metu.edu.tr)
They provide 56,800 total turnovers and retain similar to 80% of their initial activity even at the fifth catalytic run in the hydrolysis of ammonia-borane at room temperature. (metu.edu.tr)
In this paper, Fe 36 Co 44 nanocluster structure is used to catalyze the hydrolysis reaction of ammonia borane to produce H 2 . (ccspublishing.org.cn)
By comparing the adsorption process of Ammonia Borane (AB) in active sites of the cluster, which have different Effective Coordination Number (ECN), the qualitative relationship between ECN and the catalytic activation of AB is clarified, and the optimal catalytic active site is obtained. (ccspublishing.org.cn)
Ammonia-Borane (NH 3 BH 3 , AB), which has the most hydrogen-containing borohydride (19.6 wt%), high thermal stability, long-term stability in aqueous solutions and low toxicity, is becoming the leading contender for chemical hydrogen-storage materials. (ccspublishing.org.cn)
Synthesis2
Borane-based reagents are now widely used in organic synthesis. (wikipedia.org)
Sehoon Park and Sukbok Chang report a borane-catalyzed synthesis of silicon-functionalized synthetic intermediates. (thieme.de)
Amine boranes7
This structural feature is proposed to play a significant role in catalytic dehydrocoupling of amine boranes by early transition metal catalysts. (uea.ac.uk)
Behavior and kinetic of hydrolysis of amine boranes in acid media employed in chemical vapor generation. (bvsalud.org)
The behavior of NaBH4 (THB) and the amine boranes , NH3BH3 (AB), tertbutylNH2BH3 (TBAB), Me2NHBH3 (DMAB) was investigated in continuous flow chemical vapor generation of H2Se from aqueous SeIV coupled with atomic absorption spectrometry . (bvsalud.org)
In order to explain this unexpected higher efficiency of amine boranes with respect of THB, the kinetic of hydrolysis of AB, TBAB and DMAB was investigated in acid media typically employed in chemical vapor generation for trace element determination . (bvsalud.org)
Under strongly acidic conditions, the rates of hydrogen evolution produced by amine boranes hydrolysis appear to be much slower than those predicted by a pseudo-first order reaction and using the rate constants reported in the literature . (bvsalud.org)
This suggests that, at elevated acidities (5 mol L-1 HCl or HClO4), the hydrolysis of amine boranes takes place in two steps, generating a first amount of H2 (0.67-1.15 mol) much faster than the remaining about 2 mol. (bvsalud.org)
This evidence indicates a different mechanism of hydrolysis to the one accepted in the literature for amine boranes . (bvsalud.org)
Catalysts1
Lewis acidic boranes have been shown to be effective metal-free catalysts for highly selective reactions of donor-acceptor diazo compounds to a range of substrates. (edu.au)
Hydroboration1
Under conventional conditions, the borane was found to be active only in the hydroboration of aldehyde, ketone and imine substrates, with alkenes and alkynes not being reduced effectively. (rsc.org)
Irradiation1
B6H10 + (BH3) → B7H11 + H2 B7H11 + B6H10 → B13H19 + H2 Other conjuncto-boranes, where the sub-units are joined by a B-B bond, can be made by ultra violet irradiation of nido-boranes. (wikipedia.org)
Lewis1
Control over redox properties is established with respect to borane Lewis acidity, reflected in peak anodic potential shifts per borane of +250 mV for BPh 3 and +350 mV for B(C 6 F 5 ) 3 . (rsc.org)
Carboranes1
Hybrids of boranes and hydrocarbons, the carboranes are also well developed. (wikipedia.org)
Reduction3
The relatively high efficiencies of H2Se observed with amine borane reduction of inorganic SeIV at elevated acidities can be addressed to the action of borane intermediates, most probably amine borane cations , formed during amine borane hydrolysis in the same reaction conditions. (bvsalud.org)
Mechanism of the reduction of a carboxylic acid by borane: revisited and revised. (imperial.ac.uk)
Convenient catalyst for the enantioselective borane reduction of ketones at ambient temperatures. (lookchem.com)
Boron5
Borane clusters are classified as follows, where n is the number of boron atoms in a single cluster: The International Union of Pure and Applied Chemistry rules for systematic naming is based on a prefix denoting a class of compound, followed by the number of boron atoms and finally the number of hydrogen atoms in parentheses. (wikipedia.org)
Borane BH3 Diborane(6) B2H6 arachno-Tetraborane(10) B4H10 Pentaborane(9) B5H9 Decaborane(14) B10H14 Octadecaborane(22) B18H22 iso-B18H22 Hexaborate(6) B6H62− Heptaborate(7) B7H72− Octaborate(8) B8H82− Nonaborate(9) B9H92− Decaborate(10) B10H102− Undecaborate(11) B11H112− Dodecaborate(12) B12H122− The naming of anions is illustrated by octahydridopentaborate, B5H8− The hydrogen count is specified first followed by the boron count. (wikipedia.org)
For example, reaction of a borane cluster with B2H6 (as a source of BH3) can lead to the formation of a conjuncto-borane species in which borane cluster sub-units are joined by the sharing of boron atoms. (wikipedia.org)
The results of powder X-ray diffraction as well as infrared and NMR spectroscopy suggest that the activated boron has an amorphous structure, featuring borane clusters interconnected via toluene units (pictured above). (chemistryviews.org)
Boric acid is used in cosmetics, borides, boron oxides, borates, boranes, been derived for acute-duration oral susceptible to boron poisoning than pharmaceuticals, and toiletries. (cdc.gov)
Oxides2
R = Ph, L = PMe 3 (3) and R = Ph, L = P(OMe) 3 (4)), with H 2 O 2 , BH 3 ·THF or selenium gives the respective cyrhetrenylphosphine oxides, boranes and selenides. (pucv.cl)
R = Ph, L = PMe3 (3) and R = Ph, L = P(OMe)3 (4)), with H2O2, BH3·THF or selenium gives the respective cyrhetrenylphosphine oxides, boranes and selenides. (pucv.cl)
Catalyst1
Some B-B coupled conjuncto-boranes can be produced using PtBr2 as catalyst. (wikipedia.org)
Clusters3
The bonding of the clusters ushered in Polyhedral skeletal electron pair theory and Wade's rules, which can be used to predict the structures of boranes. (wikipedia.org)
For example, so far, borane clusters had not been connected directly by B-B or by short alkyl or aryl bridges to form a porous polymer. (chemistryviews.org)
Preliminary experiments showed that analogous porous polymers can be formed starting from various borane clusters and other simple organic molecules besides toluene. (chemistryviews.org)
Species2
In a previous study, we have shown that Piers' borane (1) reacted with the tungsten dinitrogen complex 2 to afford a boryldiazenido-hydrido-tungsten species. (hal.science)
Full borane coordination for all species was confirmed by analysis of X-ray crystallographic data (see ESI † ), with representative structures depicted in Fig. 1 . (rsc.org)
Adsorption1
The researchers believe that the potential use of activated boranes could not be limited to the adsorption of pollutants and that future work could reveal other possible applications. (chemistryviews.org)
Compounds1
Boranes are nonclassically-bonded compounds, that is, there are not enough electrons to form 2-centre, 2-electron bonds between all pairs of adjacent atoms in the molecule. (wikipedia.org)
Carbon2
The team named the material "activated borane" due to the similarity of its preparation with that of activated carbon. (chemistryviews.org)
Yuanshu Patent】Method of making Ortho carbon borane phenol derivatives and intermediate_Nanjing Yuanshu Medical Technology Co., Ltd. (njyspharma.com)
Stability1
5-Ethyl-2-methylpyridine borane offers increased stability and high solubility. (unipex.com)
Behavior1
Reminiscent of the behavior of diborane, some lower boranes react with air very exothermically, even explosively. (wikipedia.org)
Acid2
A case for doing so might be my post of about a year ago , addressing why borane reduces a carboxylic acid, but not its ester, where I suggested a possible mechanism. (imperial.ac.uk)
If that is the case, then this explains why borane reduces only a carboxylic acid and not an ester. (imperial.ac.uk)
Synthetic1
The development of the chemistry of boranes led to innovations in synthetic methods as well as structure and bonding. (wikipedia.org)
Structures1
Although they have few practical applications, the boranes exhibit structures and bonding that differs strongly from the patterns seen in hydrocarbons. (wikipedia.org)
Study1
The objective of this study was (1) to evaluate the effectiveness of Megabond when used with Superbond C&B, a 4-methacryloloxyethyl trimellitate anhydride (4-META)/methyl methacrylate (MMA)-tri-n-butyl borane (TBB) resin, to bond orthodontic metal brackets to human enamel and (2) to examine the influence of saliva contamination on shear bond strength. (who.int)
Formula1
A borane is a compound with the formula BxHy or a related anion. (wikipedia.org)
Scheme2
Analogous to Wade's Rules, electron counting scheme has been developed to predict or rationalize multicluster boranes. (wikipedia.org)
TS1 in this scheme is modified from before to include an extra borane coordinating to the oxygen of the O-R group. (imperial.ac.uk)
Potential1
Interest in boranes increased during World War II due to the potential of uranium borohydride for enrichment of the uranium isotopes and as a source of hydrogen for inflating weather balloons. (wikipedia.org)
Description1
A description of the bonding in the larger boranes was formulated by William Lipscomb. (wikipedia.org)