The Crystal and Molecular Structure of 4-Pentylphenyl-4′-Pentioxythiobenzoate (<ovl>5</ovl>S5)

Chruściel, J.; Pniewska, B.; Ossowska‐Chruściel, M. D.

doi:10.1080/10587259508034572

Cited by 18 publications

(17 citation statements)

References 13 publications

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“…(I) crystallizes in the non-centrosymmetric monoclinic space group P2 1 and participates in very weak intermolecular hydrogen bonds (Table 1). The observed structure of (I) is in good agreement with those determined for other S-phenyl thiobenzoates (Allouchi et al, 1995;Chrusciel et al, 1995;Ganesh et al, 2005;Jovanovski et al, 1993;Karczmarzyk et al, 2001;Low et al, 2000;Sakamoto et al, 1996;Takahashi, Sekine et al, 1998;Takahashi, Fujita et al, 1998).…”

Section: Commentsupporting

confidence: 88%

S-Phenyl 4-cyanothiobenzoate

et al. 2005

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Section: Commentsupporting

confidence: 88%

S-Phenyl 4-cyanothiobenzoate

et al. 2005

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“…Comparison with the earlier reported crystal structures of nOS5 homologues with n = 4, 5, 6 [Ossowska- Chruściel et al (2002), Chruściel et al (1995) and Karczmarzyk et al (2001), respectively] shows that the angle between the benzene rings in a molecule decreases with increasing length of the terminal C n H 2n+1 chain, but there is no distinct difference in this value for nematogenic homologues (n = 4, 5, 6) and 7OS5, the shortest of the smectogenic ones. A correspondence between the room-temperature crystal structures of 7OS5 and 6OS5 can be clearly noticed.…”

Section: Figurementioning

confidence: 50%

“…This makes the 7OS5 compound a particularly interesting homologue, as the one with the transitional length of the terminal carbon chain. In contrast to many experimental results regarding mesophases, the structures of crystal phases were reported only for three homologues with the shortest C n H 2n+1 carbon chain (n = 4, 5, 6) (Chruściel et al, 1995;Karczmarzyk et al, 2001;Ossowska-Chruściel et al, 2002).…”

Section: Introductionmentioning

confidence: 94%

“…Meanwhile, according to atomic coordinates given by Karczmarzyk et al (2001), the closest CÁ Á ÁS distance between 6OS5 molecules is equal to 4.12 Å at room temperature, which is too large even for a weak hydrogen bond (Desiraju & Steiner, 1999). Two shortest nOS5 homologues (n = 4, 5) crystallize in a monoclinic system and their crystal structures are characterized by significant intercalation of molecular layers and C-HÁ Á ÁO intermolecular hydrogen bonds are present as well (Chruściel et al, 1995;Ossowska-Chruściel et al, 2002). The monoclinic distortion in 4OS5 and 5OS5 crystals occurs in a plane parallel to the long molecular axes, the same as it is observed for the Cr II phase of 7OS5 in this study.…”

Section: Figurementioning

confidence: 99%

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Single crystal X-ray structure determination and temperature-dependent structural studies of the smectogenic compound 7OS5

Deptuch¹,

Jaworska–Gołąb²,

Kusz³

et al. 2020

Acta Crystallogr Sect B

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Structural characteristics of solid and liquid crystalline phases of 7OS5 (4-n-pentylphenyl-4′-n-heptyloxythiobenzoate), the achiral smectogenic mesogen with the shortest terminal carbon chain in the nOS5 homologous series, are studied by complementary methods. Simultaneously perfomed X-ray diffraction and differential scanning calorimetry occur to be a powerful tool to study metastable phases. The single crystal structure of a high-temperature phase, supercooled from the room temperature down to −183°C [orthorhombic crystal system; space group Pca21; a = 54.285 (5) Å, b = 5.5843 (3) Å, c = 14.841 (1) Å, Z = 8] is determined. Lamellar ordering of elongated molecules is stabilized by hydrogen bonds . Temperature dependence of unit-cell parameters in two crystal phases as well as structural parameters of liquid crystalline phases (smectic layer spacing, tilt angle, average distance between the long axes of molecules and correlation lengths) are determined by X-ray diffraction. The obtained results are compared with the data available for other compounds in the nOS5 homologous series.

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“…The second mixture, B, is a multicomponent mixture of four achiral compounds from the homologous series 4- n -pentylphenyl-4′- n -alkoxythiobenzoates, n OS5 in short, − consisting of 6OS5, 7OS5, 10OS5, and 12OS5. The mixture has been called 610712.…”

Section: Introductionmentioning

confidence: 99%

Phase Behavior and Dynamics of Binary and Multicomponent Thioester Liquid Crystal Mixtures

et al. 2016

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The results of studies conducted by means of complementary methods, differential scanning calorimetry, transmitted light intensity measurements, polarized optical microscopy, the electro-optical method, as well as dielectric relaxation spectroscopy of two new liquid crystal mixtures are presented. The first mixture is an equimolecular binary mixture consisting of two ferroelectric chiral liquid crystals from the homologous series, abbreviated as (S)-MHOBSn. The second mixture is a multicomponent mixture and consists of four mesogens from the homologous series of nOS5 as the base of the mixture, abbreviated as 610712 and chiral MHOBS8. The binary MHOBS4 + MHOBS7 mixture has an enantiotropic phase sequence, as follows: Cr, SmG*, SmI*, SmC*, N*. The second mixture has the same phase sequence but a much wider temperature range of ferroelectric SmC* phase. The switching time changes from 50 to 90 μs in the SmC* phase of the binary MHOBS4 + MHOBS7 mixture, whereas in 610712 + MHOBS8, the change is more than an order of magnitude higher, ranging from 500 to 3500 μs. Numerical analysis of the dielectric spectra results point toward the complex dynamics of the MHOBS4 + MHOBS7 and 610712 + MHOBS8 mixtures. The relaxation processes in the crystalline, SmC*, SmI*, and SmG* subphases have been observed and described. The relaxation processes have been detected up to 12 °C. There is a very low intensity Goldstone mode in SmC* and a low-frequency noncancellation mode in the SmI* and SmG* phases.

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The Crystal and Molecular Structure of 4-Pentylphenyl-4′-Pentioxythiobenzoate (5S5)

Cited by 18 publications

References 13 publications

S-Phenyl 4-cyanothiobenzoate

S-Phenyl 4-cyanothiobenzoate

Single crystal X-ray structure determination and temperature-dependent structural studies of the smectogenic compound 7OS5

Phase Behavior and Dynamics of Binary and Multicomponent Thioester Liquid Crystal Mixtures

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