Detail of "67-51-6"

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CAS Number:
67-51-6
Name:
1H-Pyrazole,3,5-dimethyl-
Superlist Name:
3,5-Dimethylpyrazole
Molecular Structure:
Formula:
C₅H₈N₂
Molecular Weight:
96.15
Synonyms:
Pyrazole,3,5-dimethyl- (6CI,8CI);1H-3,5-Dimethylpyrazole;3,5-Dimethyl-1H-pyrazole;NSC 8729;TH 564;Trixene DP 8692;U 6245;
EINECS:
200-657-5
Density:
1.027 g/cm³
Melting Point:
105-108 °C(lit.)
Boiling Point:
218 °C at 760 mmHg
Flash Point:
90.5 °C
Solubility:
methanol: 0.1 g/mL, clear
Appearance:
white crystal powder
Hazard Symbols:
Xn,Xi
Risk Codes:
22-36/37/38
Safety:
26-36 Details

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Reference

Anionic polymerization of: Anionic polymerization of .epsilon.-caprolactam activated with phosphadiazines. Shalaby, S. W.; Reimschuessel, H. K. (Chem. Res. Cent., Allied Chem. Corp., Morristown, N. J., USA). J. Polym. Sci., Polym. Chem. Ed., 15(6), 1349-57 (English) 1977. CODEN: JPLCAT. DOCUMENT TYPE: Journal CA Section: 36 (Plastics Manufacture and Processing) Section cross-reference(s): 27, 28 Phenylphosphonyl-N,N'-bis(.epsilon.-caprolactam) [54181-12-3] and phenylphosphonyl-N,N'-bis(3,5-dimethylpyrazole) [63295-35-2] were prepd. by treating caprolactam (I) [105-60-2] and 3,5-dimethylpyrazole [67-51-6], resp., with phenylphosphonic chloride [824-72-6] in the presence of Et3N at 0.degree., and were used (with a strong base, e.g. Na caprolactam) as activators for the anionic polymn. of I. Polycaprolactam [25038-54-4] prepd. in the presence of the phenylphosphonyl catalysts had higher mol. wts. and less sensitivity to thermal degrdn. on molding than that prepd. using an N-acetylcaprolactam catalyst.

A Study of Unsaturated Pyrazolate-Bridged Diruthenium Carbonyl Complexes: A Study of Unsaturated Pyrazolate-Bridged Diruthenium Carbonyl Complexes. Song, Yi-Hwa; Chi, Yun; Chen, Yao-Lun; Liu, Chao-Shiuan; Ching, Wei-Li; Carty, Arthur J.In this study， 1132-14-5 and 67-51-6 are also used.; Peng, Shie-Ming; Lee, Gene-Hsiang ( Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan). Organometallics, 21(22), 4735-4742 (English) 2002 American Chemical Society. CODEN: ORGND7. ISSN: 0276-7333. DOCUMENT TYPE: Journal CA Section: 78 (Inorganic Chemicals and Reactions) Section cross-reference(s): 75 The reaction of Ru3(CO)12 with ~3 equiv of 3,5-di-tert-butylpyrazole, (dbpz)H, in hexane at 170° in a stainless steel autoclave afforded the unsatd., pyrazolate-bridged diruthenium complex [Ru2(CO)5(dbpz)2] (2). The spectroscopic and structural anal. indicated that this compd. contains a vacant coordination site at one axial position trans to the Ru-Ru linkage. 2 Reacted with CO at room temp. to give the satd. complex [Ru2(CO)6(dbpz)2] (1b); its structure is analogous to that of the previously detd. complexes [Ru2(CO)6(pz)2], pz = pyrazolate and 3,5-di-Me pyrazolate, except that the equatorial CO ligands show a skew arrangement, an indication of steric constraints within the coordination sphere. Treatment of 2 with benzyl isocyanide or with pyridine in toluene gives substitution products [Ru2(CO)4(L)(dbpz)2], L = CNCH2Ph and pyridine, in which the incoming donor ligand occupies an equatorial position at the satd. Ru center. The structural significance of this pyrazolate-bridged diruthenium complex 2 is discussed. [Ru2(CO)4(L)(dbpz)2], L = CNCH2Ph and pyridine, reacted with CO to give [Ru2(CO)5(L)(dbpz)2]. .

Detail of "67-51-6"

1H-Pyrazole,3,5-dimethyl-

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Reference