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Detail of "2456-81-7"

  • MSDS Download
  • CAS Number:
  • 2456-81-7
  • Name:

  • 4-Pyrrolidinopyridine

  • Molecular Structure:
  • Formula:
  • C9H12N2
  • Molecular Weight:
  • 148.21
  • Synonyms:
  • 4-Pyrrolidin-1-ylpyridine;Pyridine, 4-(1-pyrrolidinyl)-;4-(Pyrrolidin-1-yl)pyridine;4-pyrrolidin-1-yl-1H-pyridine;4-(1-Pyrrolidinyl)pyridine;4-(Pyrrolidin-1-yl)piperidine;
  • EINECS:
  • 219-534-2
  • Density:
  • 1.08 g/cm3
  • Melting Point:
  • 57-58 °C
  • Boiling Point:
  • 263.1 °C at 760 mmHg
  • Flash Point:
  • 142 °C
  • Solubility:
  • water: 3 g/L (21 °C)
  • Appearance:
  • white crystal
  • Hazard Symbols:
  • ToxicT
  • Risk Codes:
  • 25-34-41-23/24/25
  • Safety:
  • 26-36/37/39-45 Details
  • Transport Information:
  • UN 2923 8/PG 3
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Reference

Preparation of aromatic polyimides
Preparation of aromatic polyimides. Ota, Takayuki; Takamiya, Naoki (Mitsubishi Chemical Industries Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 61181833 A2 14 Aug 1986 Showa, 7 pp. (Japan) CODEN: JKXXAF. CLASS: ICM: C08G073-10. APPLICATION: JP 85-20762 5 Feb 1985. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) Polyimides with low thermal expansion are prepd. by imidizing polyamic acids formed from 3,3',4,4'-biphenyltetracarboxylic acid anhydride (I), p-phenylenediamine (II), and 4,4'-diaminodiphenyl ether (III) in solvents contg. acid anhydrides and arom.In this article, certain chemicals are used. Some of their cas registry numbers are 2456-81-7 and 29319-22-0 N compds. Thus, 220 g 10.9% soln. in AcNMe2 of a polyamic acid formed from I and II, with inherent viscosity 2.4 dL/g, was mixed with 24.3 g Ac2O and 4.6 g isoquinoline (V), cast on a plate, and imidized at 120° for 10 min, then 200° for 12 min and 360° for 4 min, to give a 50-m film with tensile strength 43 kg/mm2, tensile modulus 910 kg/mm2, elongation 28%, and linear thermal expansion 0.5 ′ 10-5/K at 50-250°; vs. 26 kg/mm2, 620 kg/mm2, 16%, and 2.5 ′ 10-5/K, resp., for a film prepd. similarly without the Ac2O and V. .
Photoionization and triplet-triplet absorption of 4-pyrrolidinopyridine
Photoionization and triplet-triplet absorption of 4-pyrrolidinopyridine. Santos, O.; Testa, A. C.; O'Sullivan, M. (Dep. Chem., St. John's Univ., Jamaica, NY 11439, USA). J. Photochem., 23(4), 369-77 (English) 1983. CODEN: JPCMAE. ISSN: 0047-2670. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) A variable-temp. flash photolysis study of 4-pyrrolidinopyridine coupled with phosphorescence and photolysis expts. 2456-81-7 and 1122-58-3 which are cas registry numbers are also used here. at 77 K provides evidence that photoionization is a primary process involving an upper triplet state which reverses upon warming. Triplet-triplet absorption was obsd. at 77 K in ether-isopentane-ethanol with a wavelength max. of 510 nm and a triplet state lifetime of 1.1 s and was confirmed by comparison with the mol. phosphorescence which has the same lifetime and a wavelength max. of 380 nm. A second emission in the vicinity of 500 nm obsd. at 173 K in iso-Pr alc., which was shorter lived than the mol. phosphorescence, is tentatively assigned as emission from the mol. cation. Evidence for cation emission and recombination with an electron was also obtained for 4-N-dimethylaminopyridine. The broadening of the UV absorption band at 257 nm for 4-pyrrolidinopyridine upon cooling in alc. and acidic media is attributed to the presence of two or more conformers or to complexation via hydrogen bonding or protonation with the solvent. .
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