Study of photochromic sydnones. II. Structure of 4-bromo-3-(3-pyridyl)sydnone

Hašek, Jindřich; Obrda, J.; Huml, K.; Nešpůrek, S.; Šorm, M.

doi:10.1107/s056774087900371x

Cited by 13 publications

(1 citation statement)

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“…Also charged self-complementary systems can assemble into infinite chains, as is the case for halogen-substituted zwitterions where the XB donor and acceptor sites interact to form homomeric crystals (Figure ). − …”

Section: Crystal Engineeringmentioning

confidence: 99%

The Halogen Bond

et al. 2016

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The halogen bond occurs when there is evidence of a net attractive interaction between an electrophilic region associated with a halogen atom in a molecular entity and a nucleophilic region in another, or the same, molecular entity. In this fairly extensive review, after a brief history of the interaction, we will provide the reader with a snapshot of where the research on the halogen bond is now, and, perhaps, where it is going. The specific advantages brought up by a design based on the use of the halogen bond will be demonstrated in quite different fields spanning from material sciences to biomolecular recognition and drug design.

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Section: Crystal Engineeringmentioning

confidence: 99%

The Halogen Bond

et al. 2016

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3‐Substituted Sydnone Derivatives. Structures of 3‐Cyclohexylsydnone and of Two Forms of 3‐(3‐Pyridyl)sydnone

Rychłewska

Hodgson

Yeh

et al. 1991

J Chinese Chemical Soc

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The crystal and molecular structures of three sydnone derivatives are reported. The compound 3-cyclohexylsydaone crystallizes in space group C2/c of the monoclinic system with sixteen molecules in a cell ofdimensions a = 19.326 (3), b = 9.471 (2), c == 20.005 (4) A,,8 = 106.85 (1)°. The structure has been refined to a final value ofO.05S1 for the conventional R-factor based on 2222 independent observed intensities. Form I of3-(3-pyridyl)sydnone crystallizes in space group P2/n of the monoclinic system with eight molecules in a cell of dimensions a = 7.317(2),1> = 9.283 (2),c = 20.891 (6)A,{3 = 99.61(2)°. The structure has been refined to a final value of 0.0514 for the conventional Rfactor based on 1208 independent observed intensities. Form II of 3-(3-pyridyl)sydnone crystallizes in space group PNc of the monoclinic system with eight molecules in a cell of dimensions a = 9.073 (2), b == 22.267 (5). c == 7.494 (2) A,,8 = 112.15 (2)°. The structure has been refined to a final value of 0.0462 for the conventional R-factor based on 1330 independent observed intensities. Each of the three structures contains two crystallographically independent molecules in the cell. In [he case of3-

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Zur Elektronenstruktur der 1,2,3‐Oxadiazol‐5‐one, einer Klasse polarer Verbindungen

Kulpe¹

1985

Zeitschrift fuer Chemie

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Study of photochromic sydnones. II. Structure of 4-bromo-3-(3-pyridyl)sydnone

Cited by 13 publications

References 2 publications

The Halogen Bond

The Halogen Bond

3‐Substituted Sydnone Derivatives. Structures of 3‐Cyclohexylsydnone and of Two Forms of 3‐(3‐Pyridyl)sydnone

Zur Elektronenstruktur der 1,2,3‐Oxadiazol‐5‐one, einer Klasse polarer Verbindungen

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