Interfacial Lewis Acid–Base Adduct Formation Probed by Vibrational Spectroscopy

2018 ◽  
Vol 9 (13) ◽  
pp. 3631-3638 ◽  
Author(s):  
Joel G. Patrow ◽  
Yi Wang ◽  
Jahan M. Dawlaty
Keyword(s):  
Vibrational Spectroscopy ◽  
Lewis Acid ◽  
Adduct Formation ◽  
Acid Base

First-principles investigation of the Lewis acid–base adduct formation at the methylammonium lead iodide surface

2018 ◽  
Vol 20 (16) ◽  
pp. 11183-11195 ◽  
Author(s):  
Giacomo Giorgi ◽  
Koichi Yamashita ◽  
Hiroshi Segawa
Keyword(s):  
Lewis Acid ◽  
First Principles ◽  
Adduct Formation ◽  
Lead Iodide ◽  
Acid Base ◽  
Methylammonium Lead Iodide ◽  
Base Formation

Theoretical insights into the mechanism of Lewis acid–base formation at the surface of methylammonium lead iodide (MAPbI3).

Crystallization and grain growth regulation through Lewis acid-base adduct formation in hot cast perovskite-based solar cells

2019 ◽  
Vol 74 ◽  
pp. 172-178 ◽  
Author(s):  
Mohammad Adil Afroz ◽  
Ritesh Kant Gupta ◽  
Rabindranath Garai ◽  
Maimur Hossain ◽  
Suyash Pati Tripathi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Grain Growth ◽  
Lewis Acid ◽  
Growth Regulation ◽  
Adduct Formation ◽  
Acid Base

The Basicity of Silylamines and Alkylamines: An Equilibrium Study of the Competitive Borane Adduct Formation

1998 ◽  
Vol 53 (10) ◽  
pp. 1103-1108 ◽  
Author(s):  
Gerald Huber ◽  
Hubert Schmidbaur
Keyword(s):  
Nmr Spectroscopy ◽  
Lewis Acid ◽  
Quantum Chemical ◽  
Adduct Formation ◽  
Steric Effects ◽  
Organic Amine ◽  
Acid Base ◽  
Equilibrium Study ◽  
H Nmr ◽  
Equilibrium Reactions

AbstractIn order to investigate the Lewis acid/base chemistry of silylamines in solution, the equilibrium reactions of Me3SiNMe2 / Me3SiNMe2(BH3) and different amines NR3 / amineboranes NR3(BH3) were monitored by 1H NMR spectroscopy in C6D6 and CDCI3 at 60 °C. For the equilibrium of the reference silylamine/-borane and Me3CNMe2 / Me3CNMe2(BH3) values K = 0.35 (AG = 3.1 kJ mol-1) in C6D6 and K = 0.50 (AG = 2.0 kJ mol-1) in CDCl3 have been estimated, showing that both the silylamine and the C/Si-analogous organic amine have very similar donor properties. Small amines like NMe3 proved to be much more powerful donors than the silylamine Me3SiNMe2, whereas bulky amines are less efficient donors, indicating that steric effects play an important role. The formation of BH3 adducts of Me2NSiH3 and (H3Si)3N which could not be followed experimentally owing to the low stability of the products, has been studied by quantum chemical calculations. A comparison with data for Me3N(BH3) shows that the silylamines are poorer donors, but the reason for this remains unclear

Functionalization and cleavage of coordinated dinitrogen via hydroboration using primary and secondary boranes

2005 ◽  
Vol 83 (4) ◽  
pp. 315-323 ◽  
Author(s):  
Bruce A MacKay ◽  
Samuel A Johnson ◽  
Brian O Patrick ◽  
Michael D Fryzuk
Keyword(s):  
Key Words ◽  
Lewis Acid ◽  
Bond Cleavage ◽  
Adduct Formation ◽  
Ancillary Ligand ◽  
Similar Sequence ◽  
Acid Base ◽  
Group Migration ◽  
Dinitrogen Complex ◽  
Hb C

The reaction of the side-on, end-on ditantalum dinitrogen complex ([NPN]Ta)2(µ-η1:η2-N2)(µ-H)2 (where NPN = PhP(CH2SiMe2NPh)2) with a variety of secondary and primary boranes is reported. With 9-BBN, hydroboration of the Ta2N2 unit occurs via B-H addition, which in turn triggers a cascade of reactions that result in N—N bond cleavage, ancillary ligand rearrangement involving silicon group migration, and finally elimination of benzene from the N-Ph group and a B-H moiety to generate the imide–nitride derivative. In the presence of excess 9-BBN, the Lewis acid – base adduct of the imide–nitride ([NPµ–N]Ta(=NBC8H14)(µ-NB(H)C8H14)Ta[NPN]) is formed. A similar set of reactions is observed for dicyclohexylborane (Cy2BH), which hydroborates the dinitrogen complex to generate [NPN]Ta(H)(µ-η1:η2-NNBCy2)(µ-H)2Ta[NPN], followed by loss of H2 and silicon group migration to yield the imide–nitride [NPµ–N]Ta(=NBCy2)(µ-N)(Ta[NPN]. With thexyl borane (H2BCMe2CHMe2), a similar sequence of reactions is suggested starting with hydroboration to generate [NPN]Ta(H)(µ-η1:η2-NNB(H)C6H13)(µ-H)2Ta[NPN], followed by loss of H2 and ancillary ligand rearrangement. When bis(pentafluorophenyl)borane (HB(C6F5)2) is used, no hydroboration of coordinated N2 is observed, rather simple adduct formation to give ([NPN]Ta)2(µ-η1:η2-NN-B(H)(C6F5)2)(µ-H)2 occurs. Key words: dinitrogen, tantalum, hydroboration, N—N bond cleavage.

Solvation and redox properties of [Co(en)3]3+-[Co(en)3]2+ system

1980 ◽  
Vol 45 (2) ◽  
pp. 335-338 ◽  
Author(s):  
Adéla Kotočová ◽  
Ulrich Mayer
Keyword(s):  
Hydrogen Bond ◽  
Lewis Acid ◽  
Specific Interaction ◽  
Redox Properties ◽  
Solvation Effect ◽  
Interacting Particles ◽  
Acid Base ◽  
Polar Solvents ◽  
Oxidation Reduction ◽  
Solvent Molecules

The solvation effect of a number of nonaqueous polar solvents was studied on the oxidation-reduction properties of the [Co(en)3]3+-[Co(en)3]2+ system. Interactions of these ions with the solvent molecules are discussed in terms of their coordination, which is accompanied by a specific interaction of the Lewis acid-base type, namely formation of a hydrogen bond between the interacting particles. This is the main controlling factor of the redox properties of the studied system.

Chalcogen versus Dative Bonding in [SF3]+ Lewis Acid–Base Adducts: [SF3(NCCH3)2]+, [SF3(NC5H5)2]+, and [SF3(phen)]+ (phen = 1,10-phenanthroline)

2021 ◽  
Vol 60 (6) ◽  
pp. 3893-3901
Author(s):  
Douglas Turnbull ◽  
Praveen Chaudhary ◽  
Paul Hazendonk ◽  
Stacey D. Wetmore ◽  
Michael Gerken
Keyword(s):  
Lewis Acid ◽  
Acid Base

scholarly journals Lewis acid / Base-free Strategy for the Synthesis of 2-Arylthio and Selenyl Benzothiazole / Thiazole and Imidazole

2021 ◽  
Vol 27 (1) ◽  
pp. 17-23
Author(s):  
Guniganti Balakishan ◽  
Gullapalli Kumaraswamy ◽  
Vykunthapu Narayanarao ◽  
Pagilla Shankaraiah
Keyword(s):  
Lewis Acid ◽  
Bond Formation ◽  
Acid Base ◽  
Mechanistic Pathway ◽  
Wide Range ◽  
Acid And Base ◽  
Lewis Acid And Base ◽  
Sulfur Bond

Abstract A Cu(II)-catalyzed Csp2-Se and Csp2-Sulfur bond formation was achieved with moderate to good yields without the aid of Lewis acid and base. The reaction is compatible with a wide range of heterocycles such as benzothiazole, thiazole, and imidazole. Also, this typical protocol is found to be active in thio-selenation via S-H activation. Additionally, we proposed a plausible mechanistic pathway involving Cu(III) putative intermediate.

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