2,4,6-tris$lcurlb;2$prime;64$prime;-(p-sulfophenyl)pyridyl9$rcurlb;-s-triazine: a new analytical reagent for the spectrophotometric determination of iron

Hoyle, William C.; Benga, Joseph

doi:10.1016/0039-9140(80)80128-7

Cited by 9 publications

(6 citation statements)

References 14 publications

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“…4-Methyl-2-cyanopyridine was obtained by reacting 4-methylpridine N -oxide and trimethylsilylcyanide according to the reported procedure . This cyanopyridine (3.0 g, 25 mmol) was heated at 125 °C for 24 h in the presence of a catalytic amount of sodium hydride (60% dispersion in mineral oil, 0.1 g) to afford 1,3,5-tris(4-methyl-2-pyridyl)triazine.…”

Section: Methodsmentioning

confidence: 99%

“…4- tert -Butyl-2-cyanopyridine was obtained using the same procedure to prepare 5 with 4- tert -butylpridine N -oxide as the starting material . The mixture of 4- tert -butylcyanopyridine (4.0 g, 25 mmol) and NaH (0.12 g, obtained from the 60% sodium hydride dispersed in mineral oil by washing with n -hexane) was heated at 125 °C for 24 h to give a black solid.…”

Section: Methodsmentioning

confidence: 99%

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Single-Chain Magnets Constructed by Using the Strict Orthogonality of Easy-Planes: Use of Structural Flexibility to Control the Magnetic Properties

et al. 2010

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A family of single-chain magnets (SCMs), of which the SCM character originated from the spatial arrangement of high spin Fe(II) ions with easy-plane anisotropy, was synthesized, and their magnetic properties were investigated. The chain complexes including alternating high-spin Fe(II) ions and low-spin Fe(III) ions, catena-[Fe(II)(ClO(4))(2){Fe(III)(bpca)(2)}]ClO(4)·3MeNO(2) (1·3MeNO(2)), catena-[Fe(II)(ClO(4))(H(2)O){Fe(III)((Me)L)(2)}](ClO(4))(2)·2MeNO(2)·H(2)O (2·2MeNO(2)·H(2)O), catena-[Fe(II)(ClO(4))(H(2)O){Fe(III)((Bu)L)(2)}](ClO(4))(2)·3.5MeNO(2) (3·3.5MeNO(2)), and catena-[{Fe(II)(ClO(4))(H(2)O)Fe(II)(H(2)O)(2)}(0.5){Fe(III)((Ph)L)(2)}](ClO(4))(2.5)·4EtNO(2) (4·4EtNO(2)), were synthesized with the use of bridging ligand Hbpca (bis-(2-pyridylcarbonyl)amine)) and its derivatives of H(Me)L, H(Bu)L, and H(Ph)L each incorporating methyl, tert-butyl, or phenyl group on the 4-position of pyridyl ring. These complexes showed a typical ferrimagnetic behavior on direct current (dc) susceptibility data, and from an alternating current (ac) susceptibility measurements, SCM or superparamagnetic behaviors were confirmed with the Δ/k(B) values of 22.5(4), 21.8(18), and 28.8(3) K for 1·3MeNO(2), 2·2MeNO(2)·H(2)O, and 3·3.5MeNO(2), of which the easy-axis anisotropy was originated from the orthogonal arrangement of easy-planes of Fe(II) ions. In the crystal structures, cylindrical voids were formed along the chain axis being surrounded by four chains in 1·3MeNO(2), 2·2MeNO(2)·H(2)O, and 4·4EtNO(2) and two chains in 3·3.5MeNO(2), and solvent molecules as well as coordination-free perchlorate anions occupied these voids in a slightly different fashion depending on the complexes. 2·2MeNO(2)·H(2)O maintains its chemical composition in a dried condition, whereas 1·3MeNO(2), 3·3.5MeNO(2), and 4·4EtNO(2) easily release solvent molecules to give 1, 3, and 4, respectively. 1 and 3 maintain the crystalline character showing slightly different X-ray diffraction (XRD) patterns from those of 1·3MeNO(2) and 3·3.5MeNO(2), and an enhancement of SCM character after release of the solvent molecules was observed for both. 4 lost crystalline character to become amorphous, and it lost the SCM character at the same time.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Single-Chain Magnets Constructed by Using the Strict Orthogonality of Easy-Planes: Use of Structural Flexibility to Control the Magnetic Properties

et al. 2010

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“…[96]. The structurally similar 2,4,6-tris{2-[4-(p-sulfophenyl)]pyridyl}-s-triazine also makes it possible to determine trace quantities of iron in food products and microbiological preparations [97]. The quaternized form of tripyridyltriazine (IX) is proposed as an electrochromic material for displays [98].…”

Section: Xon Omentioning

confidence: 99%

Properties and application of aryl-substituted azines (review)

Borovik¹,

Shkurko²

1997

Chem Heterocycl Compd

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Derivatives of pyridine and di-and triazines containing aryl and heteroaryl groups as substituents exhibit a combination of properties that determine the wide range of their practical applications in scientific investigations, technology, medicine, and agriculture. Interesting properties appear even when phenyl substituents not containing functional groups in the benzene ring are introduced into the azine ring. Thus, 2,3-diphenylpyrazine has a particular smell and taste, making it possible to use it in the food industry as a flavoring additive [1]. Such "aromatic" qualities are also characteristic of other phenylpyrazines with various mutual arrangements of the phenyl and aliphatic substituents in the heterocycle. Their application makes it possible to vary the smell and flavor of food products [2]. They are also used in multicomponent compositions with the mono-, di-, tri-,

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“…1 H NMR (300 MHz, CDCl 3 , TMS as internal ref.) d 7.85 (d,J 8.8 Hz,6H,H 2,6 ),8.88 (d,J 8.8 Hz,6H,H 3,5 ). 13…”

Section: 46-tris(4-trifluoromethylphenyl)-135-triazine (12)mentioning

confidence: 99%

“…Due to their characteristic C 3 -symmetry, 1,3,5-triazines have been used in multidimensional crystal engineering using halo-gen…p-interactions, 2 and also in multidimensional crystal engineering involving metal complexes that, 3 in some cases, produce nanometer-sized oligonuclear coordination compounds. 4 1,3,5-Triazines have also been used as templates in the synthesis of supramolecular porphyrin systems, 5 as complexation agents in analytical chemistry, 6 as multi-step redox systems, 7 as stationary phases in HPLC resolution of racemic compounds, 8 as enantio-differentiating coupling reagents 9 and as high-loading scavenger resins for combinatorial chemistry. 10 The synthesis of 1,3,5-triazines has been performed by cyclotrimerization of nitriles catalysed by acids, bases 11 or activated magnesium.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of 1,3,5-triazines in solvent-free conditions catalysed by silica-supported lewis acids

et al. 2002

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The preparation of symmetrically substituted 1,3,5-triazines has been performed by cyclotrimerization of nitriles in solvent-free conditions using silica-supported Lewis acids as catalysts. Although microwave irradiation gives the best overall results in a short time, the best yields were obtained by conventional heating over periods of 24 h. The use of these recyclable and environmentally benign catalysts produces yields similar to those obtained with the more complex and contaminant lanthanide catalysts. This fact, together with the use of solvent-free conditions, makes this procedure an environmentally benign synthetic method.

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2,4,6-tris$lcurlb;2$prime;64$prime;-(p-sulfophenyl)pyridyl9$rcurlb;-s-triazine: a new analytical reagent for the spectrophotometric determination of iron

Cited by 9 publications

References 14 publications

Single-Chain Magnets Constructed by Using the Strict Orthogonality of Easy-Planes: Use of Structural Flexibility to Control the Magnetic Properties

Single-Chain Magnets Constructed by Using the Strict Orthogonality of Easy-Planes: Use of Structural Flexibility to Control the Magnetic Properties

Properties and application of aryl-substituted azines (review)

Synthesis of 1,3,5-triazines in solvent-free conditions catalysed by silica-supported lewis acids

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