bluuebunny/crossref_metadata_2025_split huggingface dataset:
Demonstration of In Situ Radio‐Frequency Heating at a Former Industrial Site
Authors: Holzer F. , Buchenhorst D. , Köhler R. , Gaffron A. , Weiß H. , Kopinke F.‐D. , Roland U. 
Published: June 2013

AbstractIn situ radio‐frequency heating (ISRFH) combined with soil vapor extraction was demonstrated at a contaminated field site of a former hydrotreatment plant in Zeitz near Leipzig. The project was carried out in several phases including cold soil vapor extraction for comparison. During the test, a soil volume of about 300 m3 was heated to an average temperature of 54 °C. As expected, the extraction rate for hydrocarbons (especially the main contaminant benzene) was markedly enhanced by soil heating. Furthermore, microbial degradation of organic compounds was supported. Although a total amount of approximately 1.4 t of hydrocarbons was removed from the soil, the demonstration project was not aimed at complete remediation of the site. Conditions limiting the extent of cleanup are discussed in detail and conclusions for an efficient application of ISRFH in soil remediation are derived whereas experiences from other sites are also implied.
Mechanistic Dichotomy in the Asymmetric Allylation of Aldehydes with Allyltrichlorosilanes Catalyzed by Chiral Pyridine N‐Oxides
Authors: Malkov Andrei V. , Stončius Sigitas , Bell Mark , Castelluzzo Fabiomassimo , Ramírez‐López Pedro , Biedermannová Lada , Langer Vratislav , Rulíšek Lubomír , Kočovský Pavel 
Published: June 2013

AbstractDetailed kinetic and computational investigation of the enantio‐ and diastereoselective allylation of aldehydes 1 with allyltrichlorosilanes 5, employing the pyridine N‐oxides METHOX (9) and QUINOX (10) as chiral organocatalysts, indicate that the reaction can proceed through a dissociative (cationic) or associative (neutral) mechanism: METHOX apparently favors a pentacoordinate cationic transition state, while the less sterically demanding QUINOX is likely to operate via a hexacoordinate neutral complex. In both pathways, only one molecule of the catalyst is involved in the rate‐ and selectivity‐determining step, which is supported by both experimental and computational data.
ChemInform Abstract: Crystal Structure, Growth and Characterization of LiPbB9O15: A New Congruent Melting Nonlinear Optical Crystal.
Authors: Xia M. J. , Li R. K. 
Published: June 2013

AbstractSingle crystals of the title compound are grown from a polycrystalline material prepared by solid state reaction of stoichiometric mixtures of PbO, Li2CO3, and H3BO3 (1.
ChemInform Abstract: Spectroscopy Properties of Na(Sr,Ba)VO4:Eu3+ Novel Red‐Emitting Phosphors for Solid State Lighting Applications.
Authors: Kesavulu C. R. , Lee Dong Gi , Yi Soung Soo , Jang Kiwan , Park Jae Hyung , Leem Jae Seung , Choi Yun Hyuk , Jang Yeon Ju , Choi Jung Gon 
Published: June 2013

AbstractNa(Sr0.97‐xBax) VO4:Eu0.033+ (x = 0—0.97) phosphors are synthesized by solid state reaction of Na2CO3, SrCO3, BaCO3, V2O5, and Eu2O3 (1150 °C, 4 h).
ChemInform Abstract: Novel Morphologic Co3O4 of Flower‐Like Hierarchical Microspheres as Electrode Material for Electrochemical Capacitors.
Authors: Liao Meixiong , Liu Yafei , Hu Zhonghua , Yu Qi 
Published: June 2013

AbstractThe title microspheres are hydrothermally synthesized from aqueous solutions of CoSO4 and L‐arginine (autoclave, 100 °C, 24 h) followed by thermal decomposition of the obtained precursor (air, 300 °C, 4 h).
ChemInform Abstract: Synthesis, Crystal Structure and Optical Properties of a New Beryllium Borate, CsBe4(BO3)3.
Authors: Huang Hongwei , Yao Wenjiao , He Ran , Chen Chuangtian , Wang Xiaoyang , Zhang Yihe 
Published: June 2013

AbstractPolycrystalline CsBe4(BO3)3 is prepared by solid state reaction of a stoichiometric mixture of Cs2CO3, BeO, and B2O3 (800 °C, 2 d, air).
ChemInform Abstract: Synthesis and Study of Tetramethylammonium Hexafluoridozirconate and Hexafluoridohafnate Solvated by H2O·HF Adducts and [N(CH3)4]2ZrF6.
Authors: Gerasimenko Andrey V. , Davidovich Ruven L. , Logvinova Vera B. , Gaivoronskaya Kseniya A. , Voit Elena I. , Merkulov Evgenii B. 
Published: June 2013

AbstractThe new compounds (NMe4)2ZrF6· (H2O·HF) (I) and (NMe4)2HfF6· (H2O·HF) (II) are synthesized by reaction of NMe4OH with MO2 in aq.
ChemInform Abstract: Synthesis, Crystal Structure and Physical Properties of Yb11Bi10‐xSnx.
Authors: Liang Ying , Cardoso‐Gil Raul , Schnelle Walter , Zhao Jing‐Tai , Grin Yuri 
Published: June 2013

AbstractThe intermetallic phases Yb11Bi10‐xSnx (x = 0, 4.8) are prepared by solid state reaction of stoichiometric mixtures of the elements (Ta ampules in evacuated silica ampules, 1.
ChemInform Abstract: (H2en)0.5[BiO(OH)2(H2O)]: The First Organic Templated Layered Bismuthate.
Authors: Wu Ya‐Qin , Qin Ying‐Lian , Li Cui‐Rui , Zhang Xian‐Ming 
Published: June 2013

AbstractThe new two‐dimensional organically templated title compound is hydrothermally synthesized from a mixture of Bi(NO3)3, en, and H2O containing a small amount of HF (autoclave, 150 °C, 4 d, 42% yield).
ChemInform Abstract: Direct Conjugate Addition of Alkynes with α,β‐Unsaturated Carbonyl Compounds Catalyzed by NCN‐Pincer Ru Complexes.
Authors: Ito Jun‐ichi , Fujii Kohei , Nishiyama Hisao 
Published: June 2013

AbstractA chiral NCN‐pincer Ru‐complex serves as suitable catalyst in the conjugate addition of alkynes with α,β‐unsaturated ketones, esters, and amides, as well as vinylphosphonates.
ChemInform Abstract: Direct Nucleophilic Addition to N‐Alkoxyamides.
Authors: Yanagita Yuta , Nakamura Hugh , Shirokane Kenji , Kurosaki Yusuke , Sato Takaaki , Chida Noritaka 
Published: June 2013

AbstractThe nucleophilic addition to N‐alkoxyamines to access multisubstituted amines is described.
ChemInform Abstract: Iridium‐Catalyzed Enantioselective Polyene Cyclization.
Authors: Schafroth Michael A. , Sarlah David , Krautwald Simon , Carreira Erick M. 
Published: June 2013

AbstractA new enantioselective polyene cyclization reaction from unactivated branched racemic allylic alcohols in the presence of an iridium catalyst is described.
ChemInform Abstract: Cobalt‐Catalyzed Acceptorless Alcohol Dehydrogenation: Synthesis of Imines from Alcohols and Amines.
Authors: Zhang Guoqi , Hanson Susan K. 
Published: June 2013

AbstractAn in situ prepared cobalt catalyst is successfully applied in the acceptorless dehydrogenation of alcohols (I) and the dehydrogenative coupling of alcohols (V) with amines (VI).
ChemInform Abstract: Co(acac)2‐Catalyzed Allylic and Benzylic Oxidation by tert‐Butyl Hydroperoxide.
Authors: Han Xiaoqiang , Zhou Ziyuan , Wan Chuan , Xiao Yumei , Qin Zhaohai 
Published: June 2013

AbstractThe conditions render possible the selective allylic and benzylic oxidation of a variety of substrates.
ChemInform Abstract: tert‐Butyldimethylsilyl‐Directed Highly Enantioselective Approach to Axially Chiral α‐Allenols.
Authors: Ye Juntao , Fan Wu , Ma Shengming 
Published: June 2013

AbstractA straightforward synthesis of axially chiral α‐allenols is realized from Tbs‐protected propargylic alcohols, aldehydes, and a chiral secondary amine, followed by desilylation.
ChemInform Abstract: Simple and Clean Synthesis of Ketones from Internal Olefins Using PdCl2/N,N‐Dimethylacetamide Catalyst System.
Authors: Mitsudome Takato , Yoshida Syuhei , Tsubomoto Yamato , Mizugaki Tomoo , Jitsukawa Koichiro , Kaneda Kiyotomi 
Published: June 2013

AbstractThe combination allows the Wacker‐type oxidation of internal olefins to ketones with molecular oxygen.
ChemInform Abstract: One‐Pot Sequential Organocatalysis: Highly Stereoselective Synthesis of Trisubstituted Cyclohexanols.
Authors: Dai Qipu , Arman Hadi , Zhao John Cong‐Gui 
Published: June 2013

AbstractThe present protocol involves a quinidine thiourea‐catalyzed tandem Henry—Michael reaction between aliphatic and aromatic oxoheptenals (I) and (IV) and nitromethane (II), followed by a tetramethyl guanidine‐catalyzed tandem retro‐Henry—Henry reaction on the reaction products of the tandem Henry—Michael reaction.
ChemInform Abstract: Nickel‐Catalyzed Carbon—Carbon Bond‐Forming Reactions of Unactivated Tertiary Alkyl Halides: Suzuki Arylations.
Authors: Zultanski Susan L. , Fu Gregory C. 
Published: June 2013

AbstractThe first examples for both the Suzuki‐type cross‐coupling of unactivated tertiary alkyl electrophiles and the application of a group 10 catalyst to cross‐couple this type of electrophiles are presented.
ChemInform Abstract: Design and Synthesis of a New Family of Fluorinated Liquid Crystals.
Authors: Nenajdenko Valentine G. , Goldberg Aleksey A. , Muzalevskiy Vasily M. , Balenkova Elizabeth S. , Shastin Aleksey V. 
Published: June 2013

AbstractThis publication describes the synthesis of (III), (IV) and other structurally related compounds via established reactions, e.
ChemInform Abstract: Scandium(III) Triflate Synthesis of Primary Homoallylic Alcohols via Carbonyl‐Ene Reaction.
Authors: Sultana Sabera , Bondalapati Somasekhar , Indukuri Kiran , Gogoi Paramartha , Saha Pipas , Saikia Anil K. 
Published: June 2013

AbstractReaction of olefins with paraformaldehyde affords the required homoallylic alcohols.
ChemInform Abstract: Aminocarbonylations Employing Mo(CO)6 and a Bridged Two‐Vial System: Allowing the Use of Nitro Group Substituted Aryl Iodides and Aryl Bromides.
Authors: Nordeman Patrik , Odell Luke R. , Larhed Mats 
Published: June 2013

AbstractMolybdenum hexacarbonyl is used as an external in situ source of carbon monoxide by treatment with DBU in a reaction chamber bridged to a second chamber containing the reactants and reagents.
ChemInform Abstract: Cross‐Coupling of ArX with ArMgBr Catalyzed by N‐Heterocyclic Carbene‐Based Nickel Complexes.
Authors: Guo Wang‐Jun , Wang Zhong‐Xia 
Published: June 2013

AbstractIt is found that the new Ni complex (NIC) efficiently promotes the cross‐coupling of aromatic Grignard reagents with aryl chlorides and fluorides under mild conditions.
ChemInform Abstract: High Surface Area CeO2 Promoted Suzuki—Miyaura Cross‐Coupling of Arylboronic Acids and Aryl Iodides.
Authors: Mayer Marilyn Graziano , Nador Fabiana , Volpe Maria Alicia , Radivo Gabriel 
Published: June 2013

AbstractThe heterogeneous CeO2 efficiently promotes the title reaction in the absence of any other transition metal catalyst.
ChemInform Abstract: Selective Introducing of Aryl and Amino Groups: Reaction of Benzanthrone and Organometallic Reagents.
Authors: Umeda Rui , Namba Teruaki , Yoshimura Tomohiro , Nakatsukasa Masamichi , Nishiyama Yutaka 
Published: June 2013

Abstract1,4‐Addition of Grignard reagents (II) and lithium alkylamides (VIII) or 1,6‐addition of lithium arylamides (VI) toward benzanthrone (I) initially afford the corresponding enols which are oxidized by oxygen in air to furnish the final products (III), (IX), and (VII), respectively.
ChemInform Abstract: Novel Stereoselective Synthesis of 1,2,3‐Trisubstituted Azetidines.
Authors: Faigl Ferenc , Kovacs Ervin , Turczel Gabor , Szoelloesy Aron , Mordini Alessandro , Balazs Laszlo , Holczbauer Tamas , Czugler Matyas 
Published: June 2013

AbstractA highly stereoselective superbase induced transformation of benzylamino group containing oxiranes into trans‐disubstituted azetidines is described.
ChemInform Abstract: Copper‐Catalyzed C—O Bond Formation: An Efficient One‐Pot Highly Regioselective Synthesis of Furans from (2‐Furyl)carbene Complexes.
Authors: Cao Hua , Zhan Haiying , Cen Jinghe , Lin Jingxin , Lin Yuanguang , Zhu Qiuxia , Fu Minling , Jiang Huanfeng 
Published: June 2013

AbstractA convenient one‐pot strategy for the regioselective synthesis of trisubstituted furanes is developed.
ChemInform Abstract: Functionalization of Dipyrromethanes via Hetero‐Diels—Alder Reaction with Azo‐ and Nitrosoalkenes.
Authors: Pereira Nelson A. M. , Lemos Americo , Serra Armenio C. , Pinho e Melo Teresa M. V. D. 
Published: June 2013

AbstractA novel synthetic strategy for the introduction of one or two side chains in position 1 and 9 of dipyrromethanes renders possible the preparation of functionalized derivatives for the construction of complex porphyrin systems and analogues.
ChemInform Abstract: Double Axially Chiral Bisphosphorylimides Catalyzed Highly Enantioselective and Efficient Friedel—Crafts Reaction of Indoles with Imines.
Authors: Wu Kun , Jiang Yi‐Jun , Fan Yan‐Sen , Sha Di , Zhang Suoqin 
Published: June 2013

AbstractBINOL and VAPOL‐derived double axially chiral bisphosphorylimide catalysts enable the atom‐economical and highly enantioselective Friedel—Crafts reaction between indoles and N‐tosylimines with a low catalyst loading.
ChemInform Abstract: Phosphine‐Catalyzed Synthesis of 3,3‐Spirocyclopenteneoxindoles from γ‐Substituted Allenoates: Systematic Studies and Targeted Applications.
Authors: Gomez Catherine , Gicquel Maxime , Carry Jean‐Christophe , Schio Laurent , Retailleau Pascal , Voituriez Arnaud , Marinetti Angela 
Published: June 2013

AbstractThe choice of the catalyst (PPh3) is crucial for the diastereoselectivity of the reaction.
ChemInform Abstract: Influence of Base and Structure in the Reversible Covalent Conjugate Addition of Thiol to Polycyclic Enone Scaffolds.
Authors: Rosenker Christopher J. , Krenske Elizabeth H. , Houk K. N. , Wipf Peter 
Published: June 2013

AbstractThe energetics of thiol addition and elimination reactions to polycyclic enones are explored using 1H NMR and density functional theory (DFT) calculations.
ChemInform Abstract: Palladium‐Catalyzed Decarboxylative Allylation and Benzylation of N‐Alloc and N‐Cbz Indoles.
Authors: Montgomery Thomas D. , Zhu Ye , Kagawa Natsuko , Rawal Viresh H. 
Published: June 2013

AbstractBesides the title reactions, a three‐component reaction for the simple generation of 3‐cinnamylated indoles (VIII) is presented.
ChemInform Abstract: Gold‐Catalyzed Cascade Rearrangements of Ynamide Propargyl Esters.
Authors: Heffernan Stephen J. , Beddoes James M. , Mahon Mary F. , Hennessy Alan J. , Carbery David R. 
Published: June 2013

AbstractThe Au‐catalyzed [3,3]‐rearrangement of ynamides (I) affords highly reactive α‐acyloxyallenamides, which can be trapped through the reaction with nucleophilic indole derivatives (II).
ChemInform Abstract: PdII‐Catalyzed Di‐o‐olefination of Carbazoles Directed by the Protecting N‐(2‐Pyridyl)sulfonyl Group.
Authors: Urones Beatriz , Gomez Arrayas Ramon , Carretero Juan Carlos 
Published: June 2013

AbstractThe ability of the N‐(2‐pyridyl)sulfonyl group to serve both as directing and readily removable protecting group in the Pd(II)‐catalyzed regioselective diolefination of carbazoles and structurally related N‐heterocycles is demonstrated for the first time.
ChemInform Abstract: Facile One‐Pot Synthesis of 3,5‐Disubstituted 1H‐Pyrazoles from Propargylic Alcohols via Propargyl Hydrazides.
Authors: Reddy Chada Raji , Vijaykumar Jonnalagadda , Gree Rene 
Published: June 2013

AbstractThe procedure consists of acid‐catalyzed N‐propargylation of TSA with propargylic alcohols and subsequent base‐promoted cyclization.
ChemInform Abstract: Facile Synthesis of [1,2,3]‐Triazole‐Fused Isoindolines, Tetrahydroisoquinolines, Benzoazepines and Benzoazocines by Palladium/Copper‐Catalyzed Heterocyclization.
Authors: Brahma Kaushik , Achari Basudeb , Chowdhury Chinmay 
Published: June 2013

AbstractA convenient method for the synthesis of 5‐ to 8‐membered benzoheterocycles is achieved by 1,3‐dipolar cycloaddition of o‐iodophenyl‐substituted azides with a variety of acetylenic substrates followed by cyclization of the resulting triazoles.
ChemInform Abstract: [Pd(PPh3)2(saccharinate)2] — General Catalyst for Suzuki—Miyaura, Negishi Cross‐Coupling and C—H Bond Functionalization of Coumaryl and Pyrone Substrates.
Authors: Shah Parin , Santana M. Dolores , Garcia Joaquin , Serrano J. Luis , Naik Minal , Pednekar Suhas , Kapdi Anant R. 
Published: June 2013

AbstractThe title catalyst is a universal precatalyst for Suzuki‐Miyaura cross‐coupling of synthetically important coumaryl and pyrone halides (I) and (VII) with aryl and heteroaryl boronic acids.
ChemInform Abstract: Synthesis of 4‐Sulfanylcoumarins Using Thiourea and Alkyl Halides as the Sulfanylation Agent in Polyethylene Glycol—Water.
Authors: Yin Zhenlan , Wang Yu , Yang Qin , Wang Ying , Xu Jingshi , Deng Zhihong , Peng Yiyuan 
Published: June 2013

AbstractReaction of alkyl halides with thiourea generates S‐alkylthiouronium reagents which are directly coupled with 4‐tosyloxycoumarins to produce the pharmaceutically important target compounds.
ChemInform Abstract: A Novel Method for Synthesizing 3‐Arylpyrrolidine and 4‐Arylpiperidine Derivatives Through an Acid‐Promoted Skeletal Rearrangement.
Authors: Yokosaka Takuya , Nemoto Tetsuhiro , Hamada Yasumasa 
Published: June 2013

AbstractTreatment of the substrates with TFA is found to provide a new access to the heterocyclic systems via intramolecular ipso‐Friedel—Crafts‐type addition, rearomatization, and intramolecular aza‐Prins reaction.
ChemInform Abstract: A Silver(I)—Rhodium(I) Cooperative Catalysis in the Reaction of N′‐(2‐Alkynylbenzylidene)hydrazide with 2‐Vinyloxirane.
Authors: Liu Hongliang , Liu Gang , Qiu Guanyinsheng , Pu Shouzhi , Wu Jie 
Published: June 2013

AbstractThe cooperative catalysis initiates a tandem reaction of N‐(alkynylbenzylidene)hydrazides with vinyloxirane giving rise to formation of pyrazoloisoquinoline carbaldehydes.
ChemInform Abstract: Suzuki—Miyaura Reactions of 2,7‐Dichloro‐1,8‐naphthyridine.
Authors: Ehlers Peter , Petrosyan Andranik , Ghochikyan Tariel V. , Saghyan Ashot S. , Neubauer Antje , Lochbrunner Stefan , Langer Peter 
Published: June 2013

AbstractNovel 2,7‐diaryl‐ and 2,7‐dialkenyl derivatives are prepared under optimized conditions.
ChemInform Abstract: Synthesis of Tetrahydropyrazolo[1,5‐c]pyrimidine‐2,7(1H,3H)‐diones.
Authors: Groselj Uros , Podlogar Anja , Novak Ana , Dahmann Georg , Golobic Amalija , Stanovnik Branko , Svete Jurij 
Published: June 2013

AbstractA straightforward synthesis of the title compounds (VII) and (XII) is presented.
ChemInform Abstract: Synthesis of Novel and Complex Tetrahydroquinazolinedione and Dihydropyrido[2,3‐d]pyrimidine Derivatives via a One‐Pot [4 + 2]‐Cycloaddition Strategy.
Authors: Sarmah Manas M. , Prajapati Dipak , Hu Wenhao 
Published: June 2013

AbstractUracil derivatives (I) and (IV) are employed as diene components for the reaction with aromatic nitroalkenes.
ChemInform Abstract: Synthesis and Characterization of a Luminescent and Fully Rigid Tetrakisimidazolium Macrocycle.
Authors: Zhou Hongjun , Wang Zhi , Gao Chao , You Jingsong , Gao Ge 
Published: June 2013

AbstractTitle compound (I) is synthesized in good yield for the first time through direct [2 + 2] cycloaddition.
ChemInform Abstract: Copper‐Catalyzed Addition of Nucleophilic Silicon to Aldehydes.
Authors: Cirriez Virginie , Rasson Corentin , Hermant Thomas , Petrignet Julien , Diaz Alvarez Jesus , Robeyns Koen , Riant Olivier 
Published: June 2013

AbstractNewly developed chiral copper(I) complexes bearing a bifluoride counteranion are used in the first example of the enantioselective title reaction.
ChemInform Abstract: Geminal Bis(silyl) Enal: A Versatile Scaffold for Stereoselective Synthesizing C3,O1‐Disilylated Allylic Alcohols Based upon Anion Relay Chemistry.
Authors: Yan Linjie , Sun Xianwei , Li Hongze , Song Zhenlei , Liu Zengjin 
Published: June 2013

AbstractGeminal bis(silyl) enal (I) is shown to be a useful scaffold for anion relay chemistry (ARC) aimed at the stereoselective synthesis of trisubstituted vinylsilanes.
ChemInform Abstract: Pronounced Solvent Effect on the Hydrostannylation of Propargylic Alcohol Derivatives with nBu3SnH/Et3B at Room Temperature.
Authors: Oderinde Martins S. , Organ Michael G. 
Published: June 2013

AbstractThe reaction proceeds with complete (Z)‐selectivity and can be effectively carried out in THF instead of the environmentally unfriendly benzene.
ChemInform Abstract: Phase Diagrams of Conventional and Inverse Functional Magnetic Heusler Alloys: New Theoretical and Experimental Investigations
Authors: Entel P. , Gruner M. E. , Hucht A. , Dannenberg A. , Siewert M. , Herper H. C. , Kakeshita T. , Fukuda T. , Sokolovskiy V. V. , Buchelnikov V. D. 
Published: June 2013

AbstractReview: 88 refs.
ChemInform Abstract: Label‐Free Luminescent Oligonucleotide‐Based Probes
Authors: Ma Dik‐Lung , He Hong‐Zhang , Leung Ka‐Ho , Zhong Hai‐Jing , Chan Daniel Shiu‐Hin , Leung Chung‐Hang 
Published: June 2013

AbstractReview: 99 refs.
Enantioseparation of Tröger's Base Derivatives by Capillary Electrophoresis Using Cyclodextrins as Chiral Selectors
Authors: Řezanka Pavel , Ryšavá Helena , Havlík Martin , Jakubek Milan , Sýkora David , Král Vladimír 
Published: June 2013

ABSTRACTThe enantioseparation of seven Tröger's base derivatives (TBs) was carried out by capillary electrophoresis using α‐, β‐, and γ‐cyclodextrins as chiral selectors and phosphate at 20 mmol/l concentration, pH 2.5, as background electrolyte. The method was optimized with respect to the concentration of chosen chiral selectors (0–50 mmol/l) and the amount of organic solvent (acetonitrile, 0–25 % (v/v)) in the electrolyte. The results indicate that all the studied variables, i.e., type of chiral selector, its concentration, and the amount of the added organic solvent, have a significant impact on the enantioseparation of the studied TBs. The best results for the majority of the separated TBs were obtained utilizing β‐cyclodextrin at 5 mmol/l concentration and with various amounts of acetonitrile added ranging from 5 to 15% (v/v) in the background electrolyte. For the two smallest studied TBs, γ‐cyclodextrin with 10% (v/v) acetonitrile also provided good resolution. Chirality 25:379–383, 2013. © 2013 Wiley Periodicals, Inc.
Circular Dichroism Spectroscopy Study of Crystalline‐to‐Amorphous Transformation in Chiral Platinum(II) Complexes
Authors: Zhang Xiao‐Peng , Wu Tao , Liu Jian , Zhao Jin‐Cheng , Li Cheng‐Hui , You Xiao‐Zeng 
Published: June 2013

ABSTRACTTwo couples of enantiomeric platinum(II) complexes: Pt(L1a)Cl (1a), Pt(L1b)Cl (1b) and Pt(L1a)(C ≡ C − Ph) (2a), Pt(L1b)(C ≡ C − Ph) (2b) (L1a = (+)‐1,3‐di‐(2‐(4,5‐pinene)pyridyl)benzene, L1b = (−)‐1,3‐di‐(2‐(4,5‐pinene)pyridyl)benzene) were synthesized and characterized. Their absolute configurations were determined by single crystal X‐ray diffraction and further verified by circular dichroism (CD) spectra (including electronic circular dichroism [ECD] and vibrational circular dichroism [VCD]). These complexes show interesting mechanoluminescence and/or vapoluminescence due to crystalline‐to‐amorphous transformation. The crystalline solids, grinding‐induced amorphous powders, and vapor‐induced amorphous powders of complexes 2a and 2b were comparatively investigated by solid‐state ECD and VCD spectra. The transformation from crystalline solids to amorphous powders was accompanied by significant variances of the spectral feature in both ECD and VCD spectra. Chirality 25:384–392, 2013. © 2013 Wiley Periodicals, Inc.