Thermal analysis and calorimetric study of 4-dimethylaminopyridine

	Thermal analysis and calorimetric study of 4-dimethylaminopyridine
	Shi, Quan ; Tan, Zhi-Cheng ; Di, You-Ying ; Tong, Bo ; Li, Yan-Sheng ; Wang, Shao-Xu
刊名	journal of chemical and engineering data
	2007-05-01
卷号	52 期号:3 页码:941-947
ISSN号	0021-9568
通讯作者	谭志诚
产权排序	1;1
英文摘要	4-dimethylaminopyridine (dmap) is an important catalyst. the thermodynamic properties of dmap were investigated through differential scanning calorimetry, thermogravimetric analysis, adiabatic calorimetry, and combustion calorimetry. the low-temperature heat capacity (c-p,c- m) was measured in the temperature range from (80 to 402) k with a high-precision automated adiabatic calorimeter. the melting temperature (t-m), the molar enthalpy (delta h-fus(m)), and the entropy (delta s-fus(m)) of fusion were determined to be ( 387.094 +/- 0.002) k, ( 21.628 +/- 0.144) kj . mol(-1), and (55.873 +/- 0.372) j . k-1 . mol(-1), respectively. the mole fraction purity of the sample used in the adiabatic calorimetric study was determined to be 0.99964 according to the van't hoff equation. the thermodynamic functions [h-t - h-298.15] and [s-t - s-298.15] were derived in the range from (80 to 400) k with temperature interval of 5 k based on the heat capacity measurements. the constant-volume energy and standard molar enthalpy of combustion have been determined, delta u-c (c7h10n2, cr) = -(4232.20 +/- 0.60) kj.mol(-1) and delta h-c(m)0 (c7h10n2, cr) = -(4235.92 +/- 0.60) kj.mol(-1), by means of a precision oxygen-bomb combustion calorimeter at t = (298.15 +/- 0.001) k. the standard molar enthalpy of formation has been derived, delta h-f(m)0 (c7h10n2, cr) = (52.20 +/- 1.71) kj.mol(-1), from the standard molar enthalpy of combustion in combination with other auxiliary thermodynamic quantities through a hess thermochemical cycle.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, multidisciplinary ; engineering, chemical
研究领域[WOS]	chemistry ; engineering
关键词[WOS]	synthetic sapphire alpha-al2o3 ; heat-capacity ; thermodynamic properties ; asymmetric catalysis ; 4-(dimethylamino)pyridine ; acylation ; 4-dialkylaminopyridines ; dmap
收录类别	SCI
原文出处	true
语种	英语
WOS记录号	WOS:000246372100052
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/99733]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China 2.Liaocheng Univ, Coll Chem & Chem Engn, Liaocheng 252059, Peoples R China 3.Dalian Jiaotong Univ, Coll Environm Sci & Engn, Dalian 116028, Peoples R China 4.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Shi, Quan,Tan, Zhi-Cheng,Di, You-Ying,et al. Thermal analysis and calorimetric study of 4-dimethylaminopyridine[J]. journal of chemical and engineering data,2007,52(3):941-947.
APA	Shi, Quan,Tan, Zhi-Cheng,Di, You-Ying,Tong, Bo,Li, Yan-Sheng,&Wang, Shao-Xu.(2007).Thermal analysis and calorimetric study of 4-dimethylaminopyridine.journal of chemical and engineering data,52(3),941-947.
MLA	Shi, Quan,et al."Thermal analysis and calorimetric study of 4-dimethylaminopyridine".journal of chemical and engineering data 52.3(2007):941-947.