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synthesis of heterocyclic compounds [ 25 , 26 ], herein we report TiCl 2 ·2H 2 O as a new catalyst for the fast, facile, and efficient synthesis of highly functionalized piperidine derivatives by the direct condensation of a variety of anilines with aryl aldehydes and ethyl acetoacetate under mild reaction conditions ( Scheme 1 ). Scheme 1 Synthesis of compounds 4a–w . For definition of the substituents R 1 and R 2 , see Table 3 . Results and discussion Initially, in order to find an efficient catalyst, the model reaction of benzaldehyde (2 mmol), aniline (2 mmol

Z. Phys. Chem. 223 (2009) 675–688 . DOI 10.1524.zpch.2009.5449 © by Oldenbourg Wissenschaftsverlag, München Thermochemistry on the Solid State Coordination Compounds M(Nic)2 · H2O(s) (M = Mn and Mg, Nic = Nicotinate) By Yuxia Kong1, Youying Di1,*, Weiwei Yang1, Guozheng Zhao1, Kun Zhang1, and Zhicheng Tan2 1 College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, Shandong, PR. China 2 Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, PR. China (Received November

möglich, die Schwingungsspektren dieser Verbindungen im ein- zelnen zuzuordnen und sie mit denjenigen von Mo0 3 bzw. MO02C12 ZU vergleichen. Tab. 1 enthält die beobachteten Schwingungsfre- quenzen beider Verbindungen. Abb. 1 zeigt die R a m a n - Spektren im Mo — 0-Valenzschwingungs- bereich. Die Struktur von MO02C12-H20 läßt sich durch die Formel MO02 /20(OH2)C12 beschreiben, d .h. die Abb. 1. R a m a n - Spektren von M o ö s (a), MoÖ»Cl 2 -H 2 0 (b), MO02C12 (c) und M o 0 3 -2 H2Ö (d) . Sonderdruckanforderungen an Priv.-Doz. Dr. R. MATTES, Anorg

Ni(C2(COO)2)(H2O)4 · 2 H2O und Ni(C2(COO)2)(H2O)2: zwei Koordinationspolymere mit dem Acetylendicarboxylat-Dianion Ni(C2(COO)2)(H2O)4 ! 2 H2O and Ni(C2 (COO)2)(H2O)2: Two Co-ordination Polymers of the Acetylenedicarboxylate Dianion Frauke Hohn, Heinrich Billetter, Ingo Pantenburg und Uwe Ruschewitz Institut für Anorganische Chemie der Universität zu Köln, Greinstraße 6, D-50939 Köln Sonderdruckanforderungen an Prof. Dr. Uwe Ruschewitz. Fax: +49 (0)221 470 4899. E-mail: Uwe.Ruschewitz@uni-koeln.de Herrn Professor Albrecht Mewis zum 60. Geburtstag gewidmet Z

American Mineralogist, Volume 94, pages 622–625, 2009 0003-004X/09/0004–622$05.00/DOI: 10.2138/am.2009.3110 622 Letter Determination of the crystal structure of sanderite, MgSO4·2H2O, by X-ray powder diffraction and the charge flipping method Hongwei Ma,1,* DaviD L. BisH,1 Hsiu-wen wang,1 anD steve J. CHipera2 1Department of Geological Sciences, Indiana University, 1001 East 10th Street, Bloomington, Indiana 47405, U.S.A. 2Chesapeake Energy Corporation, 6100 N. Western Avenue, Oklahoma City, Oklahoma 73118, U.S.A. aBstraCt The crystal structure of

·4H2O, and metastudtite, UO4·2H2O, are fascinating because they are the only reported peroxide minerals. We have determined the crystal structure of studtite using single-crystal X-ray diffractometry and a CCD- based X-ray detector (Burns 1998), and report the details of the only peroxide mineral structure. Studtite was originally described by Vaes (1947) as a ura- nyl carbonate from Shinkolobwe, Democratic Republic of Congo, and has since been reported from several localities (Cejka et al. 1996). Using material from Krunkelbach (Meszenschwand, Germany), Walenta

A calorimetric and thermodynamic investigation of the synthetic analogs of cobaltomenite, CoSeO3·2H2O, and ahlfeldite, NiSeO3·2H2O Marina V. CharykoVa1, VladiMir G. kriVoViCheV1,*, MaksiM i. lelet2, oxana s. yakoVenko1, eVGeny V. suleiManoV2, Wulf depMeier3, Viktorina V. seMenoVa1 and Maina l. Zorina1 1Department of Geology, St. Petersburg State University, 7-9 University Embankment, Saint-Petersburg 199034, Russia 2Department of Chemistry, Nizhny Novgorod State University, 65 Ilyinskaya Street, Nizhny, Novgorod, 603950, Russia 3Institut für Geowissenschaften

Synthesis, crystal structure, spectroscopic and thermal characterization of (Hampy)2[Ni(pydc)2(H2O)2] 2 H2O Alper Tolga Çolak*, I, Demet AkdumanI, Okan Zafer YeşilelII and Orhan BüyükgüngörIII I Department of Chemistry, Faculty of Arts and Sciences, Dumlupinar University, 43100 Kütahya, Turkey II Department of Chemistry, Faculty of Arts and Sciences, Eskişehir Osmangazi University, 26480 Eskişehir, Turkey III Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayis University, 55139 Kurupelit, Samsun, Turkey Received July 4, 2008; accepted

Über die Dialkaliacetylendicarboxylate Na2(C2(COO)2)(H2O)4 und K2(C2(COO)2)(H2O) On Dialkali Acetylenedicarboxylates Na2(C2(COO)2)(H2O)4 and K2(C2(COO)2)(H2O) Heinrich Billetter, Ingo Pantenburg und Uwe Ruschewitz Institut für Anorganische Chemie der Universität zu Köln, Greinstraße 6, D-50939 Köln Sonderdruckanforderungen an Prof. Dr. Uwe Ruschewitz. Fax: +49 (0)221 470 4899. E-mail: Uwe.Ruschewitz@uni-koeln.de Z. Naturforsch. 59b, 903 – 909 (2004); eingegangen am 20. April 2004 From aqueous solutions containing acetylenedicarboxylic acid and Na2CO3 or KOH

Single-Crystal Structures and Vibrational Spectra of Li[SCN] and Li[SCN] · 2 H2O Olaf Reckewega,c, Armin Schulzb, Björn Blaschkowskic, Thomas Schleidc, and Francis J. DiSalvoa a Baker Laboratory, Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853-1301, U. S. A. b Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-70569 Stuttgart, Germany c Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany Reprint requests to Dr. Olaf Reckeweg. Fax: +1-607-255-4137. E