Results 11 to 20 of about 4,382 (191)

Packaging Metal Atomic Clusters for Universal and Robust Protection through Cluster Beam Process. [PDF]

Adv Sci (Weinh)
Gas‐phase‐aggregated metal clusters are packaged and well‐protected in poly(methyl methacrylate) (PMMA) through controlled beam implantation. The packaged precise clusters show robust protection against oxidation and agglomeration. This protection also demonstrates universality, as it successfully protects metal clusters composed of various elements ...
Lu S, Zhao Z, Han J, Wang J, Zhang Y, Du Y, Guo F, Wang Z, Wang S, Tang S, Hu K, Wan J, Dai J, Song F.   +13 more
europepmc   +2 more sources

A quantitative definition of hypervalency [PDF]

, 2015
From the inception of Lewis’ theory of chemical bonding, hypervalency has remained a point of difficulty that has not been fully resolved by the currently accepted qualitative definition of this term.
Durrant, Marcus
core   +1 more source

Taxonomy of Chemical Bondings: Opportunities and Challenges. [PDF]

Angew Chem Int Ed Engl
The recent focus on supramolecular and nanosized systems produced a major increase in the types of observed noncovalent interactions and in the diversity of terms used to designate them. A hierarchical categorization (taxonomy) of terms used to designate electrophile···nucleophile interactions is proposed here.
Pizzi A, Terraneo G, Lo Iacono C, Beccaria R, Dhaka A, Resnati G.   +5 more
europepmc   +3 more sources

4-Amino-N-(2,3-dihydro-1,3-thiazol-2-ylidene)benzenesulfonamide–2,4,6-tris(pyridin-2-yl)-1,3,5-triazine (1/1)

Acta Crystallographica Section E, 2014
The sulfathiazole molecule in the title 1:1 co-crystal, C9H9N3O2S2·C18H12N6, adopts an approximate L-shape [dihedral angle between the five- and six-membered rings = 86.20 (9)°] and features an intramolecular hypervalent S...O interaction [2.8666 (15) Å].
Hadi D. Arman, Trupta Kaulgud, Edward R. T. Tiekink   +2 more
doaj   +1 more source

An iodabenzene story [PDF]

, 2017
We call iodabenzene a cyclic (CH)5I molecule. A planar iodabenzene would have 8 π electrons, a situation best avoided by an out-of-plane distortion to a bird-like geometry.
Chakkingal Parambil, Priyakumari, Hoffmann, Roald, Rawashdeh, Abdel Monem, Zeng, Tao   +3 more
core   +1 more source

A Continuum from Halogen Bonds to Covalent Bonds: Where Do λ³ Iodanes Fit?

Inorganics, 2019
The intrinsic bonding nature of λ 3 -iodanes was investigated to determine where its hypervalent bonds fit along the spectrum between halogen bonding and covalent bonding.
Seth Yannacone, Vytor Oliveira, Niraj Verma, Elfi Kraka   +3 more
doaj   +1 more source

Metal-free syn-dioxygenation of alkenes [PDF]

, 2013
Reactions employing inexpensive reagents from sustainable sources and with low toxicity are becoming increasingly desirable from an academic and industrial perspective.
Ashikari, Bataille, Buddrus, Buddrus, Criegee, D'Alfonso, Dohi, Emmanuvel, Fujita, Fujita, Fujita, Fujita, Greene, Greene, Greene, Greene, Greene, Greene, Griffith, Hirt, Hirt, Javaid, Javaid, Jones, Kang, Kim, Kim, Kolb, Koyama, Kuepper, Liang, Michael J. Rawling, Mudiganti, Nguyen, Nicholas C. O. Tomkinson, Picon, Prevost, Prevost, Prevost, Rani, Rebrovic, Richardson, Santi, Santi, Santoro, Schwarz, Shu, Silva, Jr., Sonoda, Tadokoro, VanRheenen, Wirth, Wirth, Woodward, Yuan, Yusubov, Zhdankin, Zhong, Zhong, Zhu, Çelik   +60 more
core   +1 more source

Ethyl 2-benzamido-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate

Acta Crystallographica Section E, 2010
The molecule of the title compound, C18H19NO3S, adopts an approximately planar conformation: the thiophene and phenyl rings form a dihedral angle of 8.13 (11)° while the ethyl ester group (r.m.s. deviation = 0.0217 Å)
Muhammad Naeem Khan, Misbahul Ain Khan, M. Nawaz Tahir, Asma Mukhtar   +3 more
doaj   +1 more source

Preparation and X-ray structure of 2-iodoxybenzenesulfonic acid (IBS) - a powerful hypervalent iodine(V) oxidant [PDF]

, 2018
The selective preparation of 2-iodoxybenzenesulfonic acid (IBS, as potassium or sodium salts) by oxidation of sodium 2-iodobenzenesulfonate with Oxone or sodium periodate in water is reported.
Mironova, Irina A., Nemykin, Victor N., Postnikov, Pavel S., Wirth, Thomas, Yoshimura, Akira, Yusubov, Mekhman S., Yusubova, Rosa Y., Zhdankin, Viktor V.   +7 more
core   +2 more sources

Effective Atomic Orbitals: A Tool for Understanding Electronic Structure of Molecules [PDF]

, 2014
It is discussed that one can obtain effective atomic orbitals (AOs) in quite different theoretical frameworks of Hilbert-space and three-dimensional (3D) analyses.
Mayer, István
core   +1 more source