Category: 6443-90-9

Kwun, Oh Cheun published the artcileThe thermodynamics of the formation of pyridine-halogen and interhalogen charge transfer complexes, Application In Synthesis of 6443-90-9, the publication is Taehan Hwahakhoe Chi (1982), 26(6), 363-8, database is CAplus.

UV spectra of systems of pyridine with iodine, iodine monobromide and iodine monochloride in CCl₄ reveal the formation of 1:1 complexes C₅H₅N·I₂, C₅H₅N·IBr and C₅H₅N·ICl. Equilibrium constants and thermodn. parameters were obtained. The relative stabilities of the complexes increase in the order given. This may be a measure of relative acidities of halogen and interhalogens toward pyridine and can be explained by the polarizabilities of electron acceptors and the difference of electronegativities of the halogen atoms.

Taehan Hwahakhoe Chi published new progress about 6443-90-9. 6443-90-9 belongs to iodides-buliding-blocks, auxiliary class Pyridines, name is Pyridine Iodochloride complex, and the molecular formula is C5H5ClIN, Application In Synthesis of 6443-90-9.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Poleshschuk, O. K. published the artcileAb initio study of the bonding and nuclear quadrupole coupling in the Py-ICl complex, Category: iodides-buliding-blocks, the publication is Journal of Molecular Structure (1999), 513(1-3), 29-34, database is CAplus.

As a result of the ICl complexation with Py, the ¹⁴N- and ³⁵Cl-NQR frequencies are shifted towards lower values and ¹²⁷I-NQR frequency towards higher values. In order to explain this phenomenon, ICl, Py and Py-ICl complex have been subjected to Gaussian-94 anal. on the 6-31G** level of the theory. The ab initio calculations indicate a good correlation between the calculated and the exptl. e²Qq_zz as well as the values of the asymmetry parameter and their shifts upon complexation. As follows from the Townes-Dailey approximation, increasing ionicity of the I-Cl bond implies a decrease in ³⁵Cl- and ¹⁴N-NQR frequencies and an increase in the ¹²⁷I-NQR frequency, which has been confirmed by both exptl. and calculated results. The increase in the ionic character of the I-Cl bond can be observed as an increase in the neg. charge on the chlorine atom and a decrease in the pos. charge on the iodine atom. A decrease in the e²Qq_zz ¹⁴N can be explained by an increase in the population of the π orbital while the population of the σ orbital remains unchanged. Stability of ICl complexes is determined by the contribution of the unpopulated orbital of the acceptor and coupling between the populated orbitals of the acceptor and the donor. The frequency shifts have been explained by the redistribution of electron d. taking place on complexation.

Journal of Molecular Structure published new progress about 6443-90-9. 6443-90-9 belongs to iodides-buliding-blocks, auxiliary class Pyridines, name is Pyridine Iodochloride complex, and the molecular formula is C5H5ClIN, Category: iodides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Jones, Richard H. published the artcileColossal thermal expansion and negative thermal expansion in simple halogen bonded complexes, COA of Formula: C5H5ClIN, the publication is CrystEngComm (2014), 16(2), 237-243, database is CAplus.

The crystal structures of the simple monoclinic halogen-bonded complexes pyridine-ICl and pyridine-IBr have been redetermined using modern X-ray and neutron diffraction techniques. The representation quadric surfaces for the thermal expansion tensor have been found to consist of a hyperboloid of one sheet. Neg. thermal expansion occurs parallel to the crystallog. b axis, while there is colossal thermal expansion in a direction approx. parallel to the a* direction. These effects arise because of a decrease in the strength of an already weak C-H···X (X = Br, Cl) hydrogen bond with increasing temperature The decrease in strength of the hydrogen bonding originates because of the reduction in the strength of the halogen bond formed between the nitrogen atom and the IX moiety with increasing temperature Thus since at 298 K the I-X bonds are shorter than at 110 K, there will be a smaller partial neg. charge on the X halogen at 298 K, leading to a weaker C-H···X hydrogen bond.

CrystEngComm published new progress about 6443-90-9. 6443-90-9 belongs to iodides-buliding-blocks, auxiliary class Pyridines, name is Pyridine Iodochloride complex, and the molecular formula is C5H5ClIN, COA of Formula: C5H5ClIN.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Watari, Fumio published the artcileInfrared absorption spectra of molecular complexes of pyridine. III. Molecular complexes with iodine and iodine halides, Synthetic Route of 6443-90-9, the publication is Sci. Rept. Res. Inst., Tohoku Univ. (1962), Ser. A 14(No. 1), 64-9, database is CAplus.

cf. CA 56, 9594a. When I, ICl, or IBr were dissolved in pyridine (I), new bands were observed at 627-624, 1012-1007, 1213, 1246 and 1454 cm.^-1, which were assigned as the shifted bands of ν_6a, ν₁, ν₃, 2ν_6a, and ν_19b, resp., of I. They are well defined: others appear only as a shoulder of the pure I band; some may mutually enhance their intensity, others remain almost unaffected. The rest of the absorptions of the I solution were nearly the same in band location and intensity as those of pure I. Spectra of the solid complexes are analogous to the solution spectra, though in the latter there are the shifting and intensity-changing effects in the case of liquid I. The difference of shift of 624-627 and 1007-1012 cm.^-1 is parallel to the electronegativities of the added interhalogen compounds; ICl shifts a band most markedly from the pure I spectrum.

Sci. Rept. Res. Inst., Tohoku Univ. published new progress about 6443-90-9. 6443-90-9 belongs to iodides-buliding-blocks, auxiliary class Pyridines, name is Pyridine Iodochloride complex, and the molecular formula is C14H28O5S, Synthetic Route of 6443-90-9.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Seo, Hyewon published the artcileGround-State Elevation Approach To Suppress Side Reactions in Gold-Sensing Systems Based on Alkyne Activation, Synthetic Route of 6443-90-9, the publication is Organic Letters (2014), 16(5), 1374-1377, database is CAplus and MEDLINE.

A novel approach to suppress the side reactions observed in the reaction-based gold-sensing systems based on the alkyne activation is disclosed. By elevating steric strain around the reaction site, the gold ion promoted ring-opening process in rhodamine-lactam probes is significantly accelerated, which also leads to suppression of those possible side reactions. As a result, the probes show very high sensitivity in addition to excellent selectivity toward gold species. Furthermore, bioimaging of gold species in live cells was demonstrated with a FRET version.

Organic Letters published new progress about 6443-90-9. 6443-90-9 belongs to iodides-buliding-blocks, auxiliary class Pyridines, name is Pyridine Iodochloride complex, and the molecular formula is C18H20N2O12, Synthetic Route of 6443-90-9.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Khansole, Sandeep V. published the artcileConvenient and efficient method for the iodination of aromatic amines by pyridinium iodochloride, Quality Control of 6443-90-9, the publication is Synthetic Communications (2008), 38(11), 1792-1798, database is CAplus.

A simple and efficient method for the iodination of aromatic amines using pyridinium iodochloride in methanol as solvent was reported. Mild reaction conditions, short reaction time, and good to excellent yields of the product are the noteworthy advantages of the method. Pyridinium iodochloride is an efficient solid iodinating reagent and can be handled safely.

Synthetic Communications published new progress about 6443-90-9. 6443-90-9 belongs to iodides-buliding-blocks, auxiliary class Pyridines, name is Pyridine Iodochloride complex, and the molecular formula is C5H5ClIN, Quality Control of 6443-90-9.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com