Results 201 to 210 of about 2,064,816 (279)

International tables for X-ray crystallography

, 1962
N. F. M. Henry, K. Lonsdale, J. Kasper, C. Macgillavry, G. D. Rieck, J. Ibers, W. C. Hamilton   +6 more
semanticscholar   +1 more source

On‐Demand Ligate and Release Strategy Based on Photoclick Reaction in Tandem with Pd‐Mediated Deallylation

Angewandte Chemie, EarlyView.
A consecutive, controllable, and revertible new‐to‐nature ligation and cleavage strategy has been rationally devised to selectively visualize and manipulate biomolecules of interest. The photoclick cycloaddition between allenyl phenyl ether motifs and 9,10‐phenanthrenequinone analogues installed a terminal allyl handle at the exocyclic site, thereby ...
Boog Shing Loh, Hanqing Pang, Soh Wah Yong, Cheng Weng, Wee Han Ang   +4 more
wiley   +2 more sources

A Key Fragment in Carbon Schwarzite Unit Cells and Its Triple [6]Helicene Precursor

Angewandte Chemie, EarlyView.
Adjusting the conditions of Scholl reactions has enabled the selective synthesis of polycyclic arenes with two related π‐skeletons. One π‐skeleton is a key fragment of theoretical carbon schwarzites, while the other is a triple [6]helicene, which exhibits unique supramolecular structures in the clathrate with chloroform and an absorption dissymmetry ...
Xinhe Yang, Shilong Su, Chenyu Hu, Ka Man Cheung, Daiyue Yang, Xiao Chen, Jun Yang, Zhifeng Huang, Fuk Yee Kwong, Qian Miao   +9 more
wiley   +2 more sources

Dual‐Responsive Phosphorus‐Based Fluorescent Sensors: Synthesis and Selective Metal Sensing of Pyrazolyl Phosphine Oxides

Angewandte Chemie, EarlyView.
Pyrazolyl phosphine oxides are shown to act as dual‐responsive fluorescent sensors, displaying a selective “turn‐off” fluorescence response for Fe3+ and a “turn‐on” response for Al3+. These systems serve as a new framework in the field of sensing materials based on main‐group elements such as phosphorus. Abstract Despite a wealth of previously reported
Ethan D. E. Calder, Isobel R. J. Hawes, Andrew R. Jupp   +2 more
wiley   +2 more sources

Enantioselective Photochemical Generation of a Short‐Lived, Twisted Cycloheptenone Isomer: Catalytic Formation, Detection, and Consecutive Chemistry

Angewandte Chemie, EarlyView.
In a proof‐of‐concept study, it was for the first time shown that planar chiral trans‐cycloalk‐2‐enones, such as 2, can be formed enantioselectively from their cis‐isomers by triplet energy transfer from a chiral catalyst. Computational studies performed with cyclohept‐2‐enone and enone 1 provided invaluable insights into the mode of action of the ...
Max Stierle, Constantin Jaschke, Daniel J. Grenda, Martin T. Peschel, Thomas Pickl, Niklas Gessner, Patrick Nuernberger, Benjamin P. Fingerhut, Christian Ochsenfeld, Regina de Vivie‐Riedle, Thorsten Bach   +10 more
wiley   +2 more sources

Isolation of a Square Pyramidal Bis(amidophenolate)‐Supported As(III)‐Cation: Coordination‐Induced Electromerism at As

Angewandte Chemie, EarlyView.
When a bis(amidophenolate)‐supported As(III)‐center is treated with typical two‐electron donors, a coordination‐induced electromerism induces the oxidation of the central atom to As(V) with concomitant reduction of the redox‐active ligand. Due to this triggerable electronic reorganization, the As‐center remains a remarkable Lewis acid and can be used ...
Simon B. H. Karnbrock, Jan F. Köster, Christopher Golz, Ricardo A. Mata, Manuel Alcarazo   +4 more
wiley   +2 more sources

Characterizing metal-binding sites in proteins with X-ray crystallography

Nature Protocols, 2018
K. Handing, E. Niedzialkowska, I. Shabalin, M. Kuhn, Heping Zheng, W. Minor   +5 more
semanticscholar   +1 more source

Leveraging Noncovalent Interactions for the Binding of CO by a Weakly Lewis Acidic Borane

Angewandte Chemie, EarlyView.
We report a carbonyl complex featuring a simple tri‐coordinate borane, characterized by a Lewis acidity which is only marginally higher than B(NMe2)3. Exposure of {(Ph2P)xanth}3B to carbon monoxide under mild conditions (1 bar, 25 °C) reversibly yields {(Ph2P)xanth}3B·CO.
Agamemnon E. Crumpton, Caitilín McManus, Simon Aldridge   +2 more
wiley   +2 more sources

Four‐Centre, Multielectron Bonding in Rare‐Earth Germole Sandwich Complexes

Angewandte Chemie, EarlyView.
Stepwise one‐ and two‐electron reduction of the dimeric germole‐ligated sandwich complexes [(η5‐CpGe)M(η5‐Cpttt)]2 (M = Y, Gd, Dy) produces the isostructural complex anions [{(η5‐CpGe)M(η5‐Cpttt)}2]− and [{(η5‐CpGe)M(η5‐Cpttt)}2]2−, respectively. The additional electrons populate bonding molecular orbitals extending across the {M2Ge2} rings, resulting ...
Siddhartha De, Arpan Mondal, Jem Pitcairn, Lucy Clark, Jinkui Tang, Akseli Mansikkamäki, Richard A. Layfield   +6 more
wiley   +2 more sources

Structure Determination by X-Ray Crystallography [PDF]

, 1977
M. F. C. Ladd, R. A. Palmer
openaire   +1 more source