Steric bulk
Synthesis and reactivity of rare earth complexes involving formamidinates of moderate steric bulk
... stabilise group 13 hydride complexes by application of bulky ligands [13]. It has also been possible to sterically engineer carbon-fluorine bond activation [14]. Furthermore, they can act as anionic ligand supports for ...
180
Polyhedral oligomeric silsesquioxanes in catalysis and photoluminescence applications
... It has been shown that the copolymerisation of carbon monoxide and ethene is possible using a wide range of monodentate phosphines when the P:Pd ratio.is low (4:1) This is an unexpected result, as most of the literature ...
189
The use of steric auxiliaries in nitrile oxide cycloadditions
... The behaviour of 3,4-diphenylfuroxan ( 68 ) and 3,4-bis(2,6-dichlorobenzo)furoxan ( 69 ) was considered. 3,4-Bis(ethoxycarbonyl)furoxan ( 66 ) was not used in these studies as it undergoes 1,3-dipolar cycloaddition as a ...
200
Chiral recognition of polysaccharide based CSP for separation of enantiomers and regio isomers of Prasugrel and its related impurities
... the steric bulk around the hydroxyl moiety of the modifier plays a role in the mobile phase competition, increased steric bulk resulted in increased k’ ...the steric environment of ...
7
Probing the Structure-Function Relationship of a Multifunctional Enzyme using Crystallographic Diffraction Methods.
... the bulk of the 4-NP substrate. The limited steric clash with the nitro group of 4-NP likely still permits it to bind in an orientation that is in close proximity to the activated heme Fe, which in turn ...
213
2,2,6,6 Tetramethyl 3,5 bis(2,6 diisopropylphenylimino)heptane at 150 K
... independent molecules, the tert-butyl groups (C1, C8 and C36) adopt an anti orientation with respect to each other; this is clearly a result of the steric bulk of the tert-butyl groups, as the equivalent ...
16
Synthesis and characterisation of an N-heterocyclic carbene with spatially-defined steric impact
... the steric bulk decreases in the order IPr* > IPaul > IPr > ...the steric interaction of the NHC ligand with the rest of the ligand sphere in these ...
9
Structural and kinetic profiling of allosteric modulation of duplex DNA induced by DNA-binding polyamide analogues
... the steric bulk of the iPr-Im unit (PA4) does not impact DNA binding affinity for its target sequence, NMR structural analysis reveals the larger iPr-Im unit does induce more pronounced structural ...
8
The Development of Water Soluble Olefin Metathesis Catalysts Containing an N Heterocyclic Carbene Ligand
... One promising method to increase the rate of productive catalysis for olefin metathesis is to decrease the steric bulk around the metal, which allows substrates greater access to the cat[r] ...
230
Turn on of sky blue thermally activated delayed fluorescence and circularly polarized luminescence (CPL) via increased torsion by a bulky carbazolophane donor
... The increased steric bulk of the annelated donor unit forces an increased torsion between the carbazole and the aryl bridge resulting in a decreased DEST and an enhancement of the therma[r] ...
8
Multiple solutions of steady-state Poisson–Nernst–Planck equations with steric effects
... The existence of multiple steady (equilibrium) states is important to study transitions between such states which may be related to the gating (switching between open and closed states) and selectivity of ion channels. ...
28
Multiple solutions of steady-state Poisson-Nernst-Planck equations with steric effects
... [33] I. Kaufman, D. G. Luchinsky, R. Tindjong, P. V. McClintock and R. S. Eisenberg Multi-ion conduction bands in a simple model of calcium ion channels, Phys Biol 10(2): 026007, 2013. [34] C.C. Lee, T.C. Lin and C. Liu, ...
27
Tandon, Raman (2013): Tailor-Made highly nucleophilic pyridines for organocatalysis. Dissertation, LMU München: Fakultät für Chemie und Pharmazie
... of steric hindrance on the catalytic efficiency of pyridine and phosphane catalysts, the azaMBH reaction of cyclohexenone was studied under the same conditions used for ethyl ...to steric demands of the ...
308
Determination of protonation constants and structural correlations for some tertiary formamides and acetamides in sulfuric acid with UV spectroscopy
... dimethylacetamide, diethylacetamide and diisopropylacetamide (–0.57, –0.29, –0.32 and 0.36, respective- ly), analogous acetamides were more basic than formamides. Applying the Hammett’s equation, satisfac- tory ...
11
Schizosaccharomyces pombe kinesin 5 switches direction using a steric blocking mechanism
... that steric clashes between neighboring Cut7 motor domains on the MT lattice inhibit their minus end-directed mode, but not their plus end-directed ...our steric blocking model by demonstrating that the ...
7
C60 Bioconjugation with Proteins: Towards a Palette of Carriers for All pH Ranges
... [26]. Steric hindrance and electrostatic repulsion are the key factors determining the stability of the dispersion of carbon nanomaterials-protein complexes in aqueous solutions ...
11
A modular family of phosphine phosphoramidite ligands and their hydroformylation catalysts : steric tuning impacts upon the coordination geometry of trigonal bipyramidal complexes of type [Rh(H)(CO)2(P^P*)]
... direct steric effects between the phosphoramidite part of the ligand and the substrate and not the equatorial-‐axial arrangement of the ligand on the metal; both ligands 1 and 2 primarily or solely form the ...
9
A 3D-QSAR study on the antitrypanosomal and
... Steric and electrostatic contour maps representing the CoMFA model for cytotoxic activity on L6 168. rat skeletal myoblasts[r] ...
13
A new approach to the Lennard-Jones potential and a new model: PNP-steric equations
... Equations (2.6)-(2.8) importantly generalize the PNP equations and numerically simulate the selectivity of ion channels which can not be obtained by solving the PNP equations alone (cf. [62, 63, 64, 65, 66]). ...
22
Preparations, properties and theoretical studies of a few polyimines containing ester linkages
... The mechanism of electrical conduction in polymer may not be a simple one. One of the possible routes may be that electron(s) from HOMO (Highest Occupied Molecular Orbital) of the repeating unit is (are) transferred to ...
8