Results 31 to 40 of about 3,871 (214)

Cocrystal of 4-Nitrophenol and 2,1,3-Benzoselenadizole

Molbank, 2023
The 1:1 cocrystal of 4-nitrophenol (NP) and 2,1,3-benzoselenadiazole (BSA) was successfully synthesized. The X-ray single-crystal diffraction analysis revealed that the structure contained a [Se–N]2 cyclic supramolecular synthon.
Honghong Lan, Shaobin Miao, Weizhou Wang
doaj   +1 more source

Catalysis with Chalcogen Bonds

Angewandte Chemie International Edition, 2016
AbstractHerein, we introduce catalysts that operate with chalcogen bonds. Compared to conventional hydrogen bonds, chalcogen bonds are similar in strength but more directional and hydrophobic, thus ideal for precision catalysis in apolar solvents. For the transfer hydrogenation of quinolines and imines, rate enhancements well beyond a factor of 1000 ...
Sebastian Benz, Javier López‐Andarias, Jiri Mareda, Naomi Sakai, Stefan Matile   +4 more
openaire   +5 more sources

Chalcogen–chalcogen secondary bonding interactions in trichalcogenaferrocenophanes

CrystEngComm, 2016
The solid-state structures of all members in the series of trichalcogenaferrocenophanes [FeIJC5H4E)2E′] (E, E′ = S, Se, Te) (1–9) have been explored to understand the trends in secondary bonding interactions (SBIs) between chalcogen elements sulfur, selenium, and tellurium.
Karjalainen, Minna M., Sanchez-Perez, Clara, Rautiainen, J. Mikko, Oilunkaniemi, Raija, Laitinen, Risto S.   +4 more
openaire   +3 more sources

A Combined Halogen‐ and Chalcogen‐Bonding Organocatalyst

Advanced Synthesis & Catalysis, 2023
AbstractApplications of both halogen and chalcogen bonding in organocatalysis are by now well established with various examples. However, the combination of both interactions within one catalyst is currently unknown. Herein, we describe the synthesis of such a mixed chalcogen‐ and halogen‐bond donor and present a first indication of its catalytic ...
Dhananjoy Pal, Tim Steinke, Lukas Vogel, Elric Engelage, Sascha Heinrich, Dana Kutzinski, Stefan M. Huber   +6 more
openaire   +2 more sources

Reliable Comparison of Pnicogen, Chalcogen, and Halogen Bonds in Complexes of 6-OXF2-Fulvene (X = As, Sb, Se, Te, Be, I) With Three Electron Donors

Frontiers in Chemistry, 2020
The pnicogen, chalcogen, and halogen bonds between 6-OXF2-fulvene (X = As, Sb, Se, Te, Br, and I) and three nitrogen-containing bases (FCN, HCN, and NH3) are compared.
Na Liu, Qingzhong Li, Sean A. C. McDowell   +2 more
doaj   +1 more source

Chalcogen bonds in the crystal structure of 4,7-dibromo-2,1,3-benzoselenadiazole, C6H2Br2N2Se

Zeitschrift für Kristallographie - New Crystal Structures, 2022
C6H2Br2N2Se, monoclinic, P21/c (no. 14), a = 7.7277(4) Å, b = 19.6360(6) Å, c = 10.8656(5) Å, β = 102.124(4)°, V = 1611.98(12) Å3, Z = 4, Rgt(F) = 0.0482, wRref(F2) = 0.1175, T = 290 K.
Wang Weizhou
doaj   +1 more source

Why much of Chemistry may be indisputably non-bonded?

Semina: Ciências Exatas e Tecnológicas, 2023
In this compendium, the wide scope of all intermolecular interactions ever known has been revisited, in particular giving emphasis the capability of much of the elements of the periodic table to form non-covalent contacts.
Boaz Galdino de Oliveira
doaj   +1 more source

Anion Transport with Chalcogen Bonds

Journal of the American Chemical Society, 2016
In this report, we introduce synthetic anion transporters that operate with chalcogen bonds. Electron-deficient dithieno[3,2-b;2',3'-d]thiophenes (DTTs) are identified as ideal to bind anions in the focal point of the σ holes on the cofacial endocyclic sulfur atoms.
Benz S, Macchione M, Verolet Q, Mareda J, Sakai N, Matile S   +5 more
openaire   +3 more sources

Chalcogen–Chalcogen Bonding Catalysis Enables Assembly of Discrete Molecules [PDF]

Journal of the American Chemical Society, 2019
Despite the observation of noncovalent interactions between chalcogen atoms in X-ray crystal structures, catalysis that harnesses the power of such chalcogen-chalcogen bonding interactions to produce advanced molecules remains an unresolved problem. Here, we show that a class of extraordinary chalcogen-bonding catalysts enables assembly of discrete ...
Wei Wang, Haofu Zhu, Shuya Liu, Zhiguo Zhao, Liang Zhang, Jingcheng Hao, Yao Wang   +6 more
openaire   +2 more sources

Structural Features of Chalcogen Bonds and Weak Interactions Involving Chalcogens

, 2023
The structural features of chalcogen bonding (ChB) interactions in linear fragments R–Ch⋯Nu (Ch = S, Se, Te; R = C, N, O, S, Se, Te; Nu = N, O, S, Se, Te, F, Cl, Br, I) involving Ch⋯Nu distances shorter than the sum of relevant van der Waals (vdW) radii are reviewed.
M. CARLA ARAGONI, Yury Turubaev
openaire   +2 more sources