Chemical Sciences Zeitschrift Für Naturforschung B

Chemical Sciences Zeitschrift für Naturforschung b

Editors-in-Chief T. Lindel, Braunschweig G. Müller, Konstanz R. Pöttgen, Münster H. Schmidbaur, München R. Wilhelm, Paderborn

Advisory BOARD W. Bensch, Kiel G. Bringmann, Würzburg T. Carell, München G. Erker, Münster F. E. Hahn, Münster H. Huppertz, Innsbruck M. Jansen, Bonn F. Kraus, Marburg H. Kunz, Mainz N. W. Mitzel, Bielefeld C. Näther, Kiel W. Schnick, München F. F. Seelig, Tübingen D. Stalke, Göttingen W. Steglich, München W. Uhl, Münster W. Voelter, Tübingen Abstracted/Indexed in Chemical Abstracts Service (CAS) – SciFinder; Elsevier SCOPUS; JournalTOCs; SCImago (SJR); Thomson Reuters: Current Contents/Physical, Chemical and Earth Sciences, Journal Citation Reports/Science Edition, Science Citation Index, Science Citation Index Expanded.

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ISSN 0932-0776 ∙ e-ISSN 1865-7117

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Responsible Editors Prof. Dr. Thomas Lindel, TU Braunschweig, Fakultät für Lebenswissenschaften, Institut für Organische Chemie, Hagenring 30, 38106 Braunschweig, Germany. Email: [email protected] Prof. Dr. Gerhard Müller (Managing Editor), Fachbereich Chemie, Universität Konstanz, 78457 Konstanz, Germany. Email: [email protected] Prof. Dr. Rainer Pöttgen, Universität Münster, Institut für Anorganische und Analytische Chemie, Corrensstraße 30, 48149 Münster. Email: [email protected] Prof. em. Dr. Dr. h.c. Hubert Schmidbaur, Technische Universität München, Lehrstuhl für Anorganische und Analytische Chemie, Lichtenbergstraße 4, 85747 Garching, Germany. Email: [email protected] Prof. Dr. René Wilhelm, Universität Paderborn, Fakultät für Naturwissenschaften, Department Chemie, Warburger Str. 100, 33098 Paderborn, Germany. Email: [email protected]

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COVER ILLUSTRATION Front Cover: The electron localization function (ELF) mapping for YbIrIn. (cf. Fig. 3 paper of Zaremba, Muts, Hlukhyy, Stein, Rodewald, Pavlyuk, Pöttgen and Zaremba, pp. 631–638, this issue). Z. Naturforsch. 2017 | Volume 72 | Issue 9 (b)

Contents

Nazar Zaremba, Ihor Muts, Viktor Hlukhyy, Sebastian Lingling Zhu, Chunhui Sun, Liugang Chen, Xifeng Lu, Sai Stein, Ute Ch. Rodewald, Volodymyr Pavlyuk, Rainer Li, Guotian Ye and Luoqiang Liu

Pöttgen and Vasyl Zaremba Influences of NH4F additive and calcination time on the

Equiatomic indides REIrIn (RE = La, Pr, Nd, Er–Yb) – morphology evolution of α-Al2O3 from a milled γ-Al2O3 Crystal and electronic structure 631 precursor 665

Ahmed H. Halawa, Ahmed H. Bedair, Ahmed M. El-Agrody, Muhammad Ashraf Shaheen, Muhammad Nawaz Tahir, Essam M. Eliwa, Marcel Frese, Norbert Sewald and Sarwat Sabir, Aneela Anwar, Anvarhusein A. Isab, Abdul Mohamed Shaaban Rahman Al-Arfaj, Saeed Ahmad and Shahzad Sharif Synthesis and biological activities of new bis-indole Synthesis and crystal structures of bis(imidazolidine- derivatives via microwave irradiation 639 2-thione-κS)bis(thiocyanato-κS)mercury(II) and

bis(cyanido)bis(μ2-imidazolidine-2-thione-κS) . Gamze Koz and Ömer Koz mercury(II) Hg(CN)2 671 DBU-catalyzed synthesis of novel 2-amino-3-nitrile-4H- chromenes 647 Teresa S. Ortner and Hubert Huppertz Hydrothermal synthesis and characterization of the

Ai-xiang Tian, Ting-ting Li, Yan Tian, Huai-ping Ni, Xue-bin praseodymium borate-nitrate Pr[B5O8(OH)(H2O)0.87]

Ji, Jia-ni Liu, Guo-cheng Liu and Jun Ying NO3 · 2H2O 677 Temperature-controlled formation of Anderson-type 4− compounds and their conversion to [γ-Mo8O26] -based variants using pendent ligands 655