Search results for "Tetraphenylborate"
showing 7 items of 67 documents
CCDC 1871411: Experimental Crystal Structure Determination
2019
Related Article: Adrien T. Normand, Quentin Bonnin, Stéphane Brandès, Philippe Richard, Paul Fleurat-Lessard, Charles H. Devillers, Cédric Balan, Pierre Le Gendre, Gerald Kehr, Gerhard Erker|2019|Chem.-Eur.J.|25|2803|doi:10.1002/chem.201805430
Stereo and regioselectivity in the phenylation of cationic allylpalladium(II) α-diimine complexes by tetraphenylborate anion
1993
The reaction of the cationic complex [Pd(4-methoxy-1,3-η3-cyclohexenyl)(py-2-CHNC6H4OMe-4)]+ (1) with BPh4− in the presence of fumaronitrile yields trans-3-methoxy-6-phenylcyclohexene (2a) and trans-4-methoxy-3-phenylcyclohexene (2b), in ca. 1 : 1 molar ratio. The trans stereochemistry of these products implies that the phenylation of the allyl ligand involves prior transfer of a phenyl group from BPh4− to the metal, followed by reductive coupling of the organic moieties. In the reactions of [Pd(η3-1,1-R1,R2-C3H3)(NN′)]+ (3) [NN′ 4-MeOH4C6NCHCHNC6H4OMe-4; py-2-CHNR (R C6H4OMe-4, Me, or CMe3), 2,2′-bipyridine (bipy); R1 H, R2 Ph, Me; R1 R2 Me; with BPh4− in the presence of …
Synthesis, characterization, and complexation of tetraarylborates with aromatic cations and their use in chemical sensors.
2005
Five aromatic borate anions, namely tetrakis(4-phenoxyphenyl)borate (1), tetrakis(biphenyl)borate (2), tetrakis(2-naphthyl)borate (3), tetrakis(4-phenylphenol)borate (4), and tetrakis(4-phenoxy)borate (5), have been prepared and tested as ion-recognition sites in chemical sensors for certain aromatic cations and metal ions. To gain further insight into the complexation of the cations, some complexes have been prepared and structurally characterized. The complexation behavior of 1 and 2 towards N-methylpyridinium (6), 1-ethyl-4-(methoxycarbonyl)pyridinium (7), tropylium (8), imidazolium (9), and 1-methylimidazolium (10) cations has been studied, and the stability constants of the complexes o…
The complexation of tetraphenylborate with organic N-heteroaromatic cations
2001
Complexation studies of eleven N-heteroaromatic cations with tetraphenylborate are reported. Tetraphenylborate forms complexes with five cations and reacts to form Lewis-base boranes with six cations. The complexes and the displacement reaction products were characterised by 1H NMR spectroscopy, elemental analysis and crystallographic methods. In the complexes C–H⋯π or N–H⋯π hydrogen bonds are the principal intermolecular interactions. The stability constants for the complexes are determined by 1H NMR titration in acetonitrile–methanol (1 ∶ 1) solution. Crystal structures of four of the complexes and three of the Lewis-base triphenylborane products are reported.
Oligamide mit definierter verzweigung. Lineare und cyclische oligomere. XIV.
1965
Synthese und chemische Eigenschaften des ersten verzweigten, molekulareinheitlichen Oligoamids mit definierter Struktur werden beschrieben. N,N-[Di-(ϵ-aminocaproyl)]-ϵ-aminocapronsaure (V), ein Oligomeres aus drei Aminocapronsaureresten mit einer Acylamidverzweigung, wurde durch Acylierung der Saureamidgruppe einer amino- und carboxyl-geschutzten Di-ϵ-aminocapronsaure mit einem N-geschutzten ϵ-Aminocaproylchlorid und nachfolgender Abspaltung aller Schutzgruppen als Hydrochlorid bzw. Tetraphenylborat in analysenreiner Form gewonnen. In neutralem und alkalischem Medium erleidet es bereits unter milden Bedingungen Polykondensation. The synthesis and chemical properties of the first branched, m…
CCDC 2057854: Experimental Crystal Structure Determination
2021
Related Article: Todd N. Poe, Maria J. Beltra��n-Leiva, Cristian Celis-Barros, William L. Nelson, Joseph M. Sperling, Ryan E. Baumbach, Harry Ramanantoanina, Manfred Speldrich, Thomas E. Albrecht-Scho��nzart|2021|Inorg.Chem.|60|7815|doi:10.1021/acs.inorgchem.1c00300
Crystal structure of N′′-benzyl-N′′-[3-(benzyldimethylazaniumyl)propyl]-N,N,N′,N′-tetramethylguanidinium bis(tetraphenylborate)
2015
In the crystal structure of the title salt, C24H38N42+·2C24H20B−, the C—N bond lengths in the central CN3unit of the guanidinium ion are 1.3364 (13), 1.3407 (13) and 1.3539 (13) Å, indicating partial double-bond character. The central C atom is bonded to the three N atoms in a nearly ideal trigonal–planar geometry and the positive charge is delocalized in the CN3plane. The bonds between the N atoms and the terminal methyl groups of the guanidinium moiety and the four C—N bonds to the central N atom of the (benzyldimethylazaniumyl)propyl group have single-bond character. In the crystal, C—H...π interactions between the guanidinium H atoms and the phenyl C atoms of the tetraphenylborate ions …