千解草甲素的晶体和分子结构

千解草(Pygmaeopremna Herbacea)为马鞭草科千解草属植物,分布在中国西南一带,尤以四川南部为多。民间用其茎叶治疗跌打损伤,风湿性关节炎,月经不调,产后瘀血,外感风寒、消化不良等病患,且疗效显著,广为应用。千解草属植物共有五种,均未见有关化学成份的报道。我们从千解草根的乙醚提取物中得到四种晶体,本文报道了具有代表性的千解草甲素的晶体和分子结构(1)。     

Crystal and Molecular Structure of OMPCTF

ＣｒｙｓｔａｌａｎｄＭｏｌｅｃｕｌａｒＳｔｒｕｃｔｕｒｅｏｆＯＭＰＣＴＦＷａｎｇＲｕｉ－Ｙａｏ；ＪｉｎＺｈｏｎｇ－Ｓｈｅｎｇ（ＬａｂｏｒａｔｏｒｙｏｆＲａｒｅＥａｒｔｈＣｈｅｍｉｓｔｒｙａｎｄＰｈｙｓｉｃｓ，ＣｈａｎｇｃｈｕｎＩｎｓｔｉｔｕｔｅｏｆＡ...     

Crystal and Molecular Structure of Quinide

ＣｒｙｓｔａｌａｎｄＭｏｌｅｃｕｌａｒＳｔｒｕｃｔｕｒｅｏｆＱｕｉｎｉｄｅＷＡＮＧＧａｎｇ－Ｌｉ；ＺＨＡＯＳｈｕ－Ｊｉｅ；ＣＨＥＮＤｅ－Ｃｈａｎｇ（ＮａｔｉｏｎａｌＩｎｓｔｉｔｕｔｅｆｏｒｔｈｅＣｏｎｔｒｏｌｏｆＰｈａｒｍａｃｅｕｔｉｃａｌａｎｄＢｉ...     

Molecular Structure of γ-Apienes. Crystal and Molecular Structure of Ferocin

The molecular structure of the sesquiterpene humulene ester ferocin isolated from plants of the Ferula genus was determined by x-ray structure analysis. The conformation of the 11-membered γ-humulene ring was analyzed by molecular mechanics. It was found that four energetically similar macrocycle conformations are characteristic of γ-apienes.__________Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 125–128, March–April, 2005.     

The Crystal and Molecular Structure of Fargesin

ＴｈｅＣｒｙｓｔａｌａｎｄＭｏｌｅｃｕｌａｒＳｔｒｕｃｔｕｒｅｏｆＦａｒｇｅｓｉｎＭａＹｕ－Ｌｉａｎｇ；ＨａｎＧｕｉ－Ｑｉｕ（ＮａｔｉｏｎａｌＬａｂｏｒａｔｏｒｙｏｆＮａｔｕｒａｌａｎｄＢｉｏｍｉｍｅｔｉｃＤｒｕｇｓ，ＢｅｉｊｉｎｇＭｅｄｉｃａｌＵｎ...     

Crystal and Molecular Structure of Cyanuric Acid

ＣｒｙｓｔａｌａｎｄＭｏｌｅｃｕｌａｒＳｔｒｕｃｔｕｒｅｏｆＣｙａｎｕｒｉｃＡｃｉｄＣｈｅｎＣｈａｎｇ－Ｚｈａｎｇ；ＳｈｉＪｉａｎ－ＱｉｕＬｉｎＺｈｏｕ－Ｂｉｎ；ＧａｏＤｏｎｇ－Ｓｈｏｕ；ＨｕａｎｇＸｉａｏ－Ｙｉｎｇ；ＬｉＤｉｎｇ（ＦｕｊｉａｎＩｎｓ...     

Crystal and Molecular Structure of Phosphoenolpyruvate Salts

Abstract

Phosphoenolpyruvate (PEP) plays central role in the storage and transfer of energy in biological systems. Its free energy of hydrolysis (-58.5 kJ mol^?1) is the highest known for monoesterified phosphate esters. Depending on pH PEP can occur as monoanion, dianion and trianion or as tri-basic acid. Studying PEP salts in different crystal forms provides additional information on its molecular flexibility, phosphate group conjugation with the enolpyruvate residue and kind of binding to different cations.     

Molecular and Crystal Structure of Cinnam ylidene Acetophenone

１　ＩＮＴＲＯＤＵＣＴＩＯＮＣｕｒｒｅｎｔｌｙ，ｃｏｎｓｉｓｔｅｎｔｅｆｆｏｒｔｓｈａｖｅｂｅｅｎｍａｄｅｔｏｔｈｅｉｎｖｅｓｔｉｇａｔｉｏｎｏｆｏｒｇａｎｉｃｎｏｎｌｉｎｅａｒｏｐｔｉｃａｌ（ＮＬＯ）ｍａｔｅｒｉａｌｓ〔１〕．Ｓｏｍｅｏｆｃｉｎｎａｍｙｌｉｄｅｎｅａｃｅｔｏｐｈｅｎｏｎｅｄｅｒｉｖａｔｉｖｅｓｈａｖｅｆａｉｒｌｙｓｔｒｏｎｇｓｅｃｏｎｄｈａｒｍｏｎｉｃｇｅｎｅｒａｔｉｏｎ（ＳＨＧ）ａｎｄｔｈｅｒｅｆｏｒｅａｒｅｐｏｔｅｎｔｉａｌｕｓｅｆｕｌｉｎＮＬＯｆｉｅｌｄｓ．Ｄｕｒｉｎ…     

Tetraphenylphosphonium Diiodobromide: Crystal and Molecular Structure

Complex formation in systems containing 3-carboxypropyltriphenylphosphonium or tetraphenylphosphonium bromide, molecular iodine, and chloroform solution was compared. The maximum number of iodine molecules coordinated by bromides in the solution was established by spectrophotometric method using a function of average iodine number and the stability constants of the complexes were determined. The diiodobromide [(C₆H₅)₄P]BrI₂ was studied by X-ray diffraction analysis. The ab initio calculations were performed for [Y(R)₄]I₃ (Y = N, P, As; R = CH₃, C₆H₅). The obtained experimental data and the correlations with the results of quantum-chemical calculations revealed that the tetraphenylphosphonium cation binds diiodobromide anions through the terminal halogen atoms with equal probability.