The crystal structures are reported of the isomeric compounds 2-(4-nitrophenyl)-3-phenyl-2,3-dihydro-4H-1,3-benzothiazin-4-one, (I), and ...2-(2-nitrophenyl)-3-phenyl-2,3-dihydro-4H-1,3-benzothiazin-4-one, (II), both C20H14N2O3S, being the para-nitro and ortho-nitro forms, respectively, the meta-form of which is known Yennawar et al. (2013). Acta Cryst. E69, o1679. The six-membered thiazone ring fused with a benzene ring displays a screw-boat conformation with a total puckering amplitude of 0.627 (1) Å in (I), and a near screw-boat conformation with a total puckering amplitude of 0.600 (1) Å in (II). The dihedral angles between the planes of the substituent nitrophenyl and phenyl and rings with the benzene ring of the parent benzothiazone moiety are 75.93 (5) and 82.61 (5)° in (I), and 76.79 (6) and 71.66 (6)° in (II). Weak intermolecular C—H...O hydrogen-bonding interactions between aromatic H-atom donors and both a nitro-O atom and a thiazone O-atom acceptor in (I) and a thiazone O atom in (II) are present, forming in (I) a centrosymmetric 22-membered cyclic dimer which is extended through a similar inversion-related 14-membered cyclic hydrogen-bonding association into a zigzag chain structure extending along c. In (II), a single intermolecular C—H...O hydrogen bond gives a chain structure extending along b. In addition, weak C—H...π interactions are present in both structures minimum C...ring-centroid separations = 3.630 (2) and 3.581 (2) Å, respectively.
2,3-Diphenyl-2,3-dihydro-4H-1,3-benzothiazin-4-one Hemant P. Yennawar; Ryan V. Bendinsky; David J. Coyle ...
Acta crystallographica. Section E, Structure reports online,
04/2014, Letnik:
70, Številka:
4
Journal Article
Recenzirano
Odprti dostop
In the title compound, C20H15NOS, the dihedral angle between the phenyl rings is 74.25 (6)°. The six-membered 1,3-thiazine ring has an envelope conformation with the C atom at the 2-position forming ...the flap. The crystal structure features weak C—H...O interactions, which lead to the formation of a tape motif along 110.
The crystal structures are reported of the isomeric compounds 2-(4-nitro-phen-yl)-3-phenyl-2,3-di-hydro-4H-1,3-benzo-thia-zin-4-one, (I), and ...2-(2-nitro-phen-yl)-3-phenyl-2,3-di-hydro-4H-1,3-benzo-thia-zin-4-one, (II), both C20H14N2O3S, being the para-nitro and ortho-nitro forms, respectively, the meta-form of which is known Yennawar et al. (2013). Acta Cryst. E69, o1679. The six-membered thia-zone ring fused with a benzene ring displays a screw-boat conformation with a total puckering amplitude of 0.627 (1) Å in (I), and a near screw-boat conformation with a total puckering amplitude of 0.600 (1) Å in (II). The dihedral angles between the planes of the substituent nitrophenyl and phenyl and rings with the benzene ring of the parent benzo-thia-zone moiety are 75.93 (5) and 82.61 (5)° in (I), and 76.79 (6) and 71.66 (6)° in (II). Weak inter-molecular C-H⋯O hydrogen-bonding inter-actions between aromatic H-atom donors and both a nitro-O atom and a thia-zone O-atom acceptor in (I) and a thia-zone O atom in (II) are present, forming in (I) a centrosymmetric 22-membered cyclic dimer which is extended through a similar inversion-related 14-membered cyclic hydrogen-bonding association into a zigzag chain structure extending along c. In (II), a single inter-molecular C-H⋯O hydrogen bond gives a chain structure extending along b. In addition, weak C-H⋯π inter-actions are present in both structures minimum C⋯ring-centroid separations = 3.630 (2) and 3.581 (2) Å, respectively.
The crystal structures are reported of the isomeric compounds 2-(4-nitrophenyl)-3-phenyl-2,3-dihydro-4
H
-1,3-benzothiazin-4-one, (I), and 2-(2-nitrophenyl)-3-phenyl-2,3-dihydro-4
H
...-1,3-benzothiazin-4-one, (II), both C
20
H
14
N
2
O
3
S, being the
para
-nitro and
ortho
-nitro forms, respectively, the
meta
-form of which is known Yennawar
et al.
(2013).
Acta Cryst.
E
69
, o1679. The six-membered thiazone ring fused with a benzene ring displays a screw-boat conformation with a total puckering amplitude of 0.627 (1) Å in (I), and a near screw-boat conformation with a total puckering amplitude of 0.600 (1) Å in (II). The dihedral angles between the planes of the substituent nitrophenyl and phenyl and rings with the benzene ring of the parent benzothiazone moiety are 75.93 (5) and 82.61 (5)° in (I), and 76.79 (6) and 71.66 (6)° in (II). Weak intermolecular C—H...O hydrogen-bonding interactions between aromatic H-atom donors and both a nitro-O atom and a thiazone O-atom acceptor in (I) and a thiazone O atom in (II) are present, forming in (I) a centrosymmetric 22-membered cyclic dimer which is extended through a similar inversion-related 14-membered cyclic hydrogen-bonding association into a zigzag chain structure extending along
c
. In (II), a single intermolecular C—H...O hydrogen bond gives a chain structure extending along
b
. In addition, weak C—H...π interactions are present in both structures minimum C...ring-centroid separations = 3.630 (2) and 3.581 (2) Å, respectively.
2,3-Diphenyl-2,3-di-hydro-4H-1,3-benzo-thia-zin-4-one Yennawar, Hemant P; Bendinsky, Ryan V; Coyle, David J ...
Acta crystallographica. Section E, Structure reports online,
2014-Apr-01, Letnik:
70, Številka:
Pt 4
Journal Article
Odprti dostop
In the title compound, C20H15NOS, the dihedral angle between the phenyl rings is 74.25 (6)°. The six-membered 1,3-thia-zine ring has an envelope conformation with the C atom at the 2-position forming ...the flap. The crystal structure features weak C-H⋯O inter-actions, which lead to the formation of a tape motif along 110.
2,3-Diphenyl-2,3-dihydro-4 H -1,3-benzothiazin-4-one Yennawar, Hemant P.; Bendinsky, Ryan V.; Coyle, David J. ...
Acta crystallographica. Section E, Structure reports online,
04/2014, Letnik:
70, Številka:
4
Journal Article
In the title compound, C
20
H
15
NOS, the dihedral angle between the phenyl rings is 74.25 (6)°. The six-membered 1,3-thiazine ring has an envelope conformation with the C atom at the 2-position ...forming the flap. The crystal structure features weak C—H...O interactions, which lead to the formation of a tape motif along 110.
Seven HCI Grand Challenges Stephanidis, Constantine; Salvendy, Gavriel; Antona, Margherita ...
International journal of human-computer interaction,
08/2019, Letnik:
35, Številka:
14
Journal Article
Recenzirano
Odprti dostop
This article aims to investigate the Grand Challenges which arise in the current and emerging landscape of rapid technological evolution towards more intelligent interactive technologies, coupled ...with increased and widened societal needs, as well as individual and collective expectations that HCI, as a discipline, is called upon to address. A perspective oriented to humane and social values is adopted, formulating the challenges in terms of the impact of emerging intelligent interactive technologies on human life both at the individual and societal levels. Seven Grand Challenges are identified and presented in this article: Human-Technology Symbiosis; Human-Environment Interactions; Ethics, Privacy and Security; Well-being, Health and Eudaimonia; Accessibility and Universal Access; Learning and Creativity; and Social Organization and Democracy. Although not exhaustive, they summarize the views and research priorities of an international interdisciplinary group of experts, reflecting different scientific perspectives, methodological approaches and application domains. Each identified Grand Challenge is analyzed in terms of: concept and problem definition; main research issues involved and state of the art; and associated emerging requirements.
BACKGROUND
This article presents the results of the collective effort of a group of 32 experts involved in the community of the Human Computer Interaction International (HCII) Conference series. The group's collaboration started in early 2018 with the collection of opinions from all group members, each asked to independently list and describe five HCI grand challenges. During a one-day meeting held on the 20th July 2018 in the context of the HCI International 2018 Conference in Las Vegas, USA, the identified topics were debated and challenges were formulated in terms of the impact of emerging intelligent interactive technologies on human life both at the individual and societal levels. Further analysis and consolidation led to a set of seven Grand Challenges presented herein. This activity was organized and supported by the HCII Conference series.
Institutions are strategies, norms, and rules embodied in public policies and/or social conventions. They reflect and establish expectations about who can do what, where, and how, and are often ...employed for resolving collective action dilemmas and other kinds of governance challenges. Given their salience, social science scholars have dedicated substantial effort to developing analytical approaches for understanding the design, function, and performance of institutions. Particularly valuable are approaches that generalize across institutional types and are versatile enough to be paired with multiple concepts, theories, and methods. This paper focuses on one such approach, called the Institutional Grammar. The Institutional Grammar is an approach for assessing the structure and content of institutions. It received limited attention immediately following its introduction. In recent years, however, numerous journal articles have been published that highlight the promise of the Institutional Grammar for supporting rigorous analyses of institutional design and associated outcomes within the context of various theoretical, conceptual, and methodological approaches. This article (i) reintroduces parts of the Institutional Grammar; (ii) summarizes the theoretical, methodological, and empirical foci of all journal articles published to date that address it; and (iii) presents an agenda for advancing the study of institutions using the Institutional Grammar.
Las instituciones son estrategias, normas y reglas incorporadas en políticas públicas y/o convenciones sociales. Reflejan y establecen expectativas sobre quién puede hacer qué, dónde y cómo, y con frecuencia se emplean para resolver dilemas de acción colectiva y otros tipos de desafíos de gobernabilidad. Dada su importancia, los especialistas en ciencias sociales han dedicado un esfuerzo sustancial al desarrollo de enfoques analíticos para comprender el diseño, la función y el desempeño de las instituciones. Particularmente valiosos son los enfoques que se generalizan a través de los tipos institucionales y son lo suficientemente versátiles como para combinarse con múltiples conceptos, teorías y métodos. Este documento se centra en uno de estos enfoques, denominado Gramática Institucional. La gramática institucional es un enfoque para evaluar la estructura y el contenido de las instituciones. Recibió una atención limitada inmediatamente después de su introducción. En los últimos años, sin embargo, se han publicado numerosos artículos de revistas que destacan la promesa de la Gramática Institucional de respaldar análisis rigurosos del diseño institucional y los resultados asociados en el contexto de varios enfoques teóricos, conceptuales y metodológicos. Este artículo (i) reintroduce partes de la gramática institucional; (ii) resume los enfoques teóricos, metodológicos y empíricos de todos los artículos de revistas publicados hasta la fecha que lo abordan; y (iii) presenta una agenda para avanzar en el estudio de las instituciones utilizando la Gramática Institucional.
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