Phosphorus Sulfur and Silicon and The Related Elements最新文献_第10页

Microemulsion and macroemulsion polymerization of octamethylcyclotetrasiloxane: A comparative study 八甲基环四硅氧烷微乳液与大乳液聚合的比较研究

Phosphorus Sulfur and Silicon and The Related Elements Pub Date : 2017-04-05 DOI: 10.1080/10426507.2017.1315418

J. Khanjani, M. Zohuriaan‐Mehr, S. Pazokifard

引用次数: 3

Improved synthesis of N-sulfonylformamidine derivatives promoted by thionyl chloride 亚硫酰氯促进n -磺酰基甲脒衍生物的改进合成

Phosphorus Sulfur and Silicon and The Related Elements Pub Date : 2017-03-15 DOI: 10.1080/10426507.2017.1284843

Ruzeahong Hudabaierdi, Abudureheman Wusiman, Ayinigeer Mulati

引用次数: 8

Some introductory remarks to “In memoriam of Prof. Harry R. Hudson” “纪念哈里·r·哈德森教授”的引言

Phosphorus Sulfur and Silicon and The Related Elements Pub Date : 2017-03-03 DOI: 10.1080/10426507.2017.1300034

G. Hägele

{"title":"Some introductory remarks to “In memoriam of Prof. Harry R. Hudson”","authors":"G. Hägele","doi":"10.1080/10426507.2017.1300034","DOIUrl":"https://doi.org/10.1080/10426507.2017.1300034","url":null,"abstract":"Phosphoros–the Morningstar, what a wonderful world came down to us through the millennia–let us keep and protect it! And Harry Hudson was able to wander between the worlds of arts and science as well. His advice in English history and literature was well accepted, like his profound knowledge in chemistry. We teamed up as partners in a group of chemists named EUROPHOS and combined our labs in London and in Düsseldorf with syntheses, analytics, structures, NMR spectroscopy and biological aspects. We enjoyed mutual visits, supported by binational funds, and looked into α-aminophosphonic acids, α-aminophosphinic acids and corresponding esters, generally abbreviated as NHR1-CHR2-P(O)(R3)OR4. Selected results were published in a review, edited by V. Khukar and H. R. Hudson1 and in several publications.2a–j Molecular modelling, ring current calculations, and NMR were combined to understand complex 1H NMR spectra of NHPh-CHPh-P(O(OEt)2 and related structures.3 Compounds with sterically demanding substituents NH(CHPh2)-CHR-P(O(OEt)2 (R2 = Ph, Naphthyl, Anthranyl, Pyrenyl) were synthesized.4a–b Our particular interests were drawn toward the sterically overcrowded α-N-(diphenylmethyl)amino-α-(1-pyrenyl)methanephosphonic acid diethylester NH(CHPh2)-CH (Pyr)-P(O(OEt)2 which gave rise to a 1H NMR spectrum5 (Figure 1) involving a total of 29 spins (Scheme 1):","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"48 5 1","pages":"578 - 580"},"PeriodicalIF":0.0,"publicationDate":"2017-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82764680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Triphenylarsine as an effective catalyst in a mechanistic investigation of trans- 1, 2-di (methoxycarbonyl)-6, 6-dimethyl-5, 7-dioxaspiro [2, 5] octane-4, 8-dione formation 三苯larsin在反式- 1,2 -二(甲氧羰基)- 6,6 -二甲基- 5,7 -二氧辛烷[2,5]- 4,8 -二酮生成机理研究中的有效催化剂

Phosphorus Sulfur and Silicon and The Related Elements Pub Date : 2017-03-03 DOI: 10.1080/10426507.2017.1302448

F. Ghodsi, S. Habibi‐Khorassani, M. Shahraki

{"title":"Triphenylarsine as an effective catalyst in a mechanistic investigation of trans- 1, 2-di (methoxycarbonyl)-6, 6-dimethyl-5, 7-dioxaspiro [2, 5] octane-4, 8-dione formation","authors":"F. Ghodsi, S. Habibi‐Khorassani, M. Shahraki","doi":"10.1080/10426507.2017.1302448","DOIUrl":"https://doi.org/10.1080/10426507.2017.1302448","url":null,"abstract":"ABSTRACT The kinetics and mechanism of the reaction between dimethyl acetylendicarboxylate (DMAD) and Meldrum's acid (MA) in the presence of triphenylarsine (TPA) as a catalyst were investigated in a methanol environment by the UV/vis spectrophotometry technique. In this work, the reaction followed second- order kinetics and the first and second steps of the reaction mechanism were recognized as the fast and rate-determining step (RDS), respectively. A significant point in this reaction “in comparison with previous work” is related to the change in behavior of the kinetics and reaction mechanism in the presence of triphenylarsine (TPA). Activation energy and parameters (Ea, ΔH‡, ΔS‡, and ΔG‡) were determined for the reaction and a comparison between ΔH‡ and TΔS‡ values showed that the reaction is entropy-controlled. High values of the activation Gibbs free energy indicated that the reaction was chemically controlled. Also, the large negative value of ΔS‡ implied an associative mechanism. GRAPHICAL ABSTRACT","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"Suppl 1","pages":"960 - 966"},"PeriodicalIF":0.0,"publicationDate":"2017-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90229647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Recalling my memories with Professor Harry R. Hudson 回忆起我和哈里·r·哈德森教授的回忆

Phosphorus Sulfur and Silicon and The Related Elements Pub Date : 2017-02-22 DOI: 10.1080/10426507.2017.1296732

G. Keglevich

引用次数: 0

The first C(O)NHP(O)-based phosphoric triamide structure with an N‒H···π hydrogen bonding: A combination of X-ray crystallography and theoretical study to evaluate the strength of hydrogen bonds 第一个基于C(O)NHP(O)的磷酸三酰胺结构与N-H···π氢键:结合x射线晶体学和理论研究来评价氢键的强度

Phosphorus Sulfur and Silicon and The Related Elements Pub Date : 2017-02-21 DOI: 10.1080/10426507.2017.1295960

M. Taherzadeh, M. Pourayoubi, R. Afzali, M. Nečas

{"title":"The first C(O)NHP(O)-based phosphoric triamide structure with an N‒H···π hydrogen bonding: A combination of X-ray crystallography and theoretical study to evaluate the strength of hydrogen bonds","authors":"M. Taherzadeh, M. Pourayoubi, R. Afzali, M. Nečas","doi":"10.1080/10426507.2017.1295960","DOIUrl":"https://doi.org/10.1080/10426507.2017.1295960","url":null,"abstract":"GRAPHICAL ABSTRACT ABSTRACT The hydrogen bond pattern of N-(4-methoxybenzoyl)-N′,N″-bis(4-methylbenzyl)-phosphoric triamide, C24H28N3O3P, (I), was investigated. In the crystal structure, the molecules are aggregated through NCP―H···O═P and NP―H···O═C hydrogen bonds in a one-dimensional arrangement parallel to the c axis (NCP is the nitrogen atom in the C(O)NHP(O) segment and NP stands for the two other nitrogen atoms bonded to the P atom). There is also a novel NP‒H···π hydrogen bond in the crystal which extends the aggregation of the molecules to a two-dimensional array parallel to the bc plane. A Cambridge Structural Database (CSD, version 5.37, Feb 2016) analysis shows that the N―H···π hydrogen bond was not observed in any of 156 [RC(O)NH]P(O)[NR1R2]2 (R1 ≠ H, R2 = H or ≠ H) phosphoric triamide structures reported so far. The theoretical calculations at the B3LYP/6-311G** level of theory (DFT, AIM, and NBO) were performed to evaluate the strengths of NCP―H···O═P, NP―H···O═C and NP―H···π hydrogen bonds, considering two-aggregate molecular assemblies containing these hydrogen bonds. The calculations on the title compound suggest that the intermolecular NCP―H···O═P hydrogen bond is stronger than NP―H···O═C and NP―H···π interactions. The hydrogen bond strength was investigated by NBO, topological analysis, geometry calculation, Hirshfeld surface analysis and experimental spectroscopic results, which are in agreement with each other.","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"202 1","pages":"936 - 944"},"PeriodicalIF":0.0,"publicationDate":"2017-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75678933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

The comparison of the dynamic 1H NMR measurements between two special ylides derived from triphenylphosphine and triethylphosphite: Experimental and theoretical calculations 由三苯基膦和三乙基亚磷酸酯衍生的两种特殊酰基化合物的动态1H NMR测量比较:实验和理论计算

Phosphorus Sulfur and Silicon and The Related Elements Pub Date : 2017-02-21 DOI: 10.1080/10426507.2017.1292274

F. Ghodsi, M. Shahraki, S. Habibi‐Khorassani, Maryam Shokoohian

{"title":"The comparison of the dynamic 1H NMR measurements between two special ylides derived from triphenylphosphine and triethylphosphite: Experimental and theoretical calculations","authors":"F. Ghodsi, M. Shahraki, S. Habibi‐Khorassani, Maryam Shokoohian","doi":"10.1080/10426507.2017.1292274","DOIUrl":"https://doi.org/10.1080/10426507.2017.1292274","url":null,"abstract":"GRAPHICAL ABSTRACT ABSTRACT Dynamic 1H NMR measurements have been experimentally performed in particular phosphorus ylides involving 2-mercaptobenzimidazole and 2-mercaptobenzoxazole for comparison around the C˭C double bond and two single bonds (C‒C and C‒N). Also, activation parameters including ΔG‡, ΔS‡ and ΔΗ‡ were calculated using the ab initio and DFT methods at the HF/6-31G (d,p) and B3LYP/6-31G(d,p) levels of theory for the rotational interchangeable process of the two Z and E isomers of the ylides in the presence of a solvent environment (CDCl3). The obtained results were consistent with the dynamic 1H NMR data. The rotational energy barrier around the carbon=carbon double bond in the ylide 4 derived from triphenylphosphine was 2 kcal⋅mol−1 higher in energy than the generated ylide 5 from triethylphosphite. In general, in both rotational Z and E isomers of ylide 5, the rotational energy barrier around the carbon–nitrogen single bond was higher for the carbon‒carbon single bond due to the inversion of a lone pair on nitrogen atom during a rotation. Although, the HF/6-31G(d,p) level was a desirable level for the rotation around the single bond, nevertheless, the B3LYP/6-31G(d,p) level was recognized as a suitable level for rotation around the double bond. Applying solvent media (chloroform) at the two levels of calculations increased consistency with the experimental results.","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"94 1","pages":"929 - 935"},"PeriodicalIF":0.0,"publicationDate":"2017-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90723992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Barium aluminate nano-powders efficient catalyst for the synthesis of novel benzo[b]thiophene, thieno[2,3-c]thiopyran and thieno[2,3-c]pyridine derivatives 铝酸钡纳米粉末高效催化剂合成新型苯并[b]噻吩、噻吩[2,3-c]噻吩和噻吩[2,3-c]吡啶衍生物

Phosphorus Sulfur and Silicon and The Related Elements Pub Date : 2017-02-21 DOI: 10.1080/10426507.2017.1295961

H. Yarahmadi, M. Ghashang, Saeid Jabbar Zare, A. Khodaivandi

引用次数: 3

3,5-Thietanopentofuranoside S-oxides and S,S-dioxides – preparation and structural characterization 3,5-羟基呋喃呋喃苷S-氧化物和S,S-二氧化物的制备及结构表征

Phosphorus Sulfur and Silicon and The Related Elements Pub Date : 2017-02-17 DOI: 10.1080/10426507.2017.1292273

J. Voss, D. Otzen, G. Adiwidjaja

引用次数: 1

Design, synthesis, crystal structure and insecticidal evaluation of novel arylpyrazole derivatives containing cyhalothroyl thiourea moiety 含环卤基硫脲的新型芳基吡唑衍生物的设计、合成、晶体结构及杀虫效果评价

Phosphorus Sulfur and Silicon and The Related Elements Pub Date : 2017-02-17 DOI: 10.1080/10426507.2017.1292272

Zhengbo Han, Wen-Yuan Wu, F. Chen, Xixia Guan, Xiao-Huan Fu, Peng Jiang, Rong Wan

{"title":"Design, synthesis, crystal structure and insecticidal evaluation of novel arylpyrazole derivatives containing cyhalothroyl thiourea moiety","authors":"Zhengbo Han, Wen-Yuan Wu, F. Chen, Xixia Guan, Xiao-Huan Fu, Peng Jiang, Rong Wan","doi":"10.1080/10426507.2017.1292272","DOIUrl":"https://doi.org/10.1080/10426507.2017.1292272","url":null,"abstract":"GRAPHICAL ABSTRACT ABSTRACT On the basis of the commercial insecticide Fipronil, a series of novel arylpyrazole derivatives containing the cyhalothroyl thiourea moiety were designed and synthesized via the key intermediate 5-amino-3-cyano-1-(substituted phenyl) pyrazole. The structures of target compounds were characterized by 1H NMR, FT-IR, elemental analysis and single crystal X-ray diffraction analysis. Their insecticidal activities against Culex pipiens and Musca domestica were evaluated. The results of bioassays indicated that title compounds exhibited satisfactory insecticidal activities. Among those, Compound 7t ((E)-3-(2-chloro- 3, 3, 3-trifluoroprop-1-en-1-yl)-N-((3-cyano-1-(2, 6- dichloro-4-(trifluoromethyl) phenyl)-1H-pyrazol-5-yl) carbamothioyl)- 2, 2-dimethyl cyclopropane carboxamide) exhibited the best insecticidal activities because of its lowest KT50 values, which are superior to the commercial insecticide Dextral tetramethrin and similar to Prallethrin. The type and position of substituent on the benzene ring played important roles on the biological activities of target compounds.","PeriodicalId":20043,"journal":{"name":"Phosphorus Sulfur and Silicon and The Related Elements","volume":"13 1","pages":"911 - 918"},"PeriodicalIF":0.0,"publicationDate":"2017-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85298139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7