Influence of Alkali Metal Cations on the Photodimerization of Bromo Cinnamates Studied by Solid-State NMR

2020 ◽  
Vol 124 (50) ◽  
pp. 27614-27620
Author(s):  
Marufa Zahan ◽  
He Sun ◽  
Sophia E. Hayes ◽  
Harald Krautscheid ◽  
Jürgen Haase ◽  
...  
Keyword(s):  
Solid State ◽  
Alkali Metal ◽  
Solid State Nmr ◽  
Metal Cations ◽  
Alkali Metal Cations

New Bulky Allyl Complexes of Lanthanide Metals:  Role of Alkali-Metal Cations in Controlling Solid-State and Solution Assemblies in Precatalysts

2003 ◽  
Vol 22 (15) ◽  
pp. 3028-3030 ◽  
Author(s):  
Timothy J. Woodman ◽  
Mark Schormann ◽  
David L. Hughes ◽  
Manfred Bochmann
Keyword(s):  
Solid State ◽  
Alkali Metal ◽  
Metal Cations ◽  
Alkali Metal Cations ◽  
Lanthanide Metals

Calixcrown Binding to Alkali Metal Cations—Comparison of Two 1,3-Alternate Calix[4]arenebiscrown-5 Ligands

1996 ◽  
Vol 49 (2) ◽  
pp. 183 ◽  
Author(s):  
R Abidi ◽  
Z Asfari ◽  
JM Harrowfield ◽  
AN Sobolev ◽  
J Vicens
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Alkali Metal ◽  
Chloroform Solution ◽  
Metal Cations ◽  
Alkali Metal Cations ◽  
Triclinic Space Group ◽  
Space Group ◽  
Solid State Conformation

While determination of the crystal structure of 1,3;2,4-biscrown-5-calix[4] arene (chloroform solvate, triclinic. space group Pī, a 11.151(4), b 16.832(6), c 21.929(8) Ǻ, α 98.78(3), β 92.02(3), γ 92.12(3)°, Z = 4 f.u ., conventional R on |F| 0.085 for 4699 'observed', I > 2σ(I), reflections) shows that this ligand has a closely similar solid state conformation to that of its previously characterized, substituted analogue, 1,3;2,4-biscrown-5-p-t-butylcalix[4] arene, the two ligands do differ significantly in their interactions with alkali metal picrates in chloroform solution. Most obviously, the t-butyl substituents of the latter ligand appear to inhibit caesium binding. changing the nature of the interactions to a form similar to that of both ligands with Li+ and Na+, for which 1H n.m.r. spectroscopy indicates weak exocyclic binding to some of the polyether oxygen atoms. 1H n.m.r. spectroscopy also provides evidence of picrate binding to the metals in isomeric forms.

scholarly journals The phenoxyl group-modulated interplay of cation–π and σ-type interactions in the alkali metal series

2020 ◽  
Vol 22 (46) ◽  
pp. 27105-27120
Author(s):  
Giacomo Prampolini ◽  
Marco d'Ischia ◽  
Alessandro Ferretti
Keyword(s):  
Alkali Metal ◽  
Noncovalent Interactions ◽  
Metal Cations ◽  
Alkali Metal Cations ◽  
Striking Effect

An extensive exploration of the interaction PESs of phenol and catechol complexes with alkali metal cations reveals a striking effect of –OH substitution on the balance between cation-π and σ-type noncovalent interactions.

Derivation of Class II Force Fields. 4. van der Waals Parameters of Alkali Metal Cations and Halide Anions

1997 ◽  
Vol 101 (39) ◽  
pp. 7243-7252 ◽  
Author(s):  
Zhengwei Peng ◽  
Carl S. Ewig ◽  
Ming-Jing Hwang ◽  
Marvin Waldman ◽  
Arnold T. Hagler
Keyword(s):  
Alkali Metal ◽  
Force Fields ◽  
Van Der Waals ◽  
Metal Cations ◽  
Class Ii ◽  
Alkali Metal Cations ◽  
Halide Anions
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