Zeitschrift fuer Naturforschung B (ZNB) publishes novel research in all areas of inorganic chemistry, organic chemistry, and analytical chemistry. In particular, the journal focuses on solid state chemistry, coordination chemistry, main group element chemistry, synthetic organic chemistry, natural product chemistry and, to a lesser extent, on analytical chemistry. For more than 65 years Zeitschrift fuer Naturforschung B has been open to contributions from all fields of experimental and theoretical chemistry. Zeitschrift fuer Naturforschung B publishes 12 issues per volume/year. Sometimes double issues occur.

Topics 
Solid state chemistry
Coordination chemistry
Main group element chemistry
Organic chemistry
Natural product chemistry.

The "Zeitschrift für Naturforschung - Section B Journal of Chemical Sciences" publishes novel research across all areas of inorganic chemistry, organic chemistry, and analytical chemistry. The journal particularly focuses on solid state chemistry, coordination chemistry, main group element chemistry, synthetic organic chemistry, and natural product chemistry, with a lesser emphasis on analytical chemistry. For over 65 years, the journal has welcomed contributions from all fields of experimental and theoretical chemistry. It publishes 12 issues per year, with occasional double issues.\n\nTopics\nSolid state chemistry\nCoordination chemistry\nMain group element chemistry\nOrganic chemistry\nNatural product chemistry.

《Zeitschrift für Naturforschung - Section B Journal of Chemical Sciences》致力于发表无机化学、有机化学和分析化学各领域的新研究。期刊特别关注固态化学、配位化学、主族元素化学、合成有机化学、天然产物化学，以及在较小程度上关注分析化学。超过65年来，《Zeitschrift für Naturforschung B》欢迎来自实验和理论化学各个领域的贡献。该期刊每年出版12期，有时会出现双期。\n\n主题\n固态化学\n配位化学\n主族元素化学\n有机化学\n天然产物化学。

Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences

Abstract A new, convenient and efficient method for the construction of a new polycyclic condensed system containing an azepine and pyrazolophthalazine has been developed in the form of a two-step protocol comprising the condensation reaction of hydroxylamine with 1 H -indazolo[1,2- b ]phthalazine-1,6,11-trione derivative, followed by a Beckman rearrangement reaction using polyphosphoric acid (PPA) as catalyst. Various substituted substrates were successfully used, affording the azepino phthalazine hybrids in good yields and in short reaction times.

Esma Lamera

Aissa Chibani

Zouhair Bouaziz

Marc Le Borgne

Ramzi Maadadi

Abdelmalek Bouraiou

Zeitschrift für Naturforschung B

Polyphosphoric acid (PPA): a new, highly efficient catalyst for the synthesis of functionalized azepino phthalazine hybrids

多聚磷酸（PPA）：合成功能化氮杂菲啶并酞嗪杂化物的新型高效催化剂

Abstract The stannides SrPdSn (TiNiSi type, orthorhombic space group Pnma ) and m-BaPtSn (EuNiGe type, monoclinic space group P 2 1 / c ) were synthesized from the elements in sealed tantalum ampoules in a high-frequency furnace. Their structures were refined from single-crystal X-ray diffraction data. SrPdSn crystallizes directly from the melt and is stable upon annealing at T = 1073 K. A BaPtSn sample quenched from the melt adopts the cubic LaIrSi-type structure, cubic space group P 2 1 3 (c-BaPtSn) and shows a temperature induced (annealing at 1070 K) structural phase transition leading to a EuNiGe-type low-temperature modification m-BaPtSn. The phase transition leads to a reconstruction within the polyanionic [PtSn] δ − network. The latter is three-dimensional and composed of ten-membered Pt 5 Sn 5 rings in c-BaPtSn, while the polyanion is two-dimensional in m-BaPtSn and is composed of condensed Pt 4 Sn 4 and Pt 2 Sn 2 rings. The two-dimensional substructure leads to a strong moisture sensitivity for m-BaPtSn. The Pt–Sn distances in both modifications range from 257 to 267 pm, indicating substantial covalent bonding.

Judith Bönnighausen

Theresa Block

Rainer Pöttgen

The stannides SrPdSn and m-BaPtSn

锡化物SrPdSn和m-BaPtSn

Abstract Eu 3 Cl 2 [AsO 3 ][As 2 O 5 ] ( a = 541.45(4) pm, b = 837.46(6) pm, c = 1107.56(8) pm, α = 90.059(2)°, β = 94.628(2)°, γ = 90.449(2)°) and Gd 3 Cl 2 [AsO 3 ][As 2 O 5 ] ( a = 539.89(4) pm, b = 838.20(6) pm, c = 1103.10(8) pm, α = 90.056(2)°, β = 94.601(2)°, γ = 90.388(2)°) crystallize isotypically with Sm 3 Cl 2 [AsO 3 ][As 2 O 5 ] in the triclinic space group P <m:math xmlns:m="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <m:mrow> <m:mover accent="true"> <m:mn>1</m:mn> <m:mo>‾</m:mo> </m:mover> </m:mrow> </m:math> $\bar{1}$ with Z = 2. Colorless, transparent, platelet-shaped single crystals of Eu 3 Cl 2 [AsO 3 ][As 2 O 5 ] and Gd 3 Cl 2 [AsO 3 ][As 2 O 5 ] were obtained by solid-state syntheses from their binary components in fused silica ampoules at temperatures around 800 °C.

Svetlana Schander

Ralf J. C. Locke

Mathias S. Wickleder

Thomas Schleid

Two further members of the triclinic lanthanoid(III) chloride oxoarsenate(III) series Ln 3Cl2[AsO3][As2O5] with Ln = Eu and Gd

三斜晶系镧系(III)氯氧化砷酸盐(III)系列中另外两个成员Ln 3Cl2[AsO3][As2O5]，其中Ln = Eu和Gd

Abstract Overweight and adiposity are of increasing actual importance. The title compounds from traditional Asian medicine raised actual interest for their anti-adipogenic properties. Of the 16 compounds synthesized in previous work, four were subject of X-ray diffraction analyses, three of them, by CSD code designated JUQKIS (CCDC 1886088), JUQKUE (CCDC 1894160) and JUQKOY (CCDC 1886089) were chosen for the present electron density study based on the invariom formalism. The major chemical difference arising from the terminal keto group in the JUQKIS and JUQKOY derivatives and one of the hydroxyl groups in JUQKUE is discussed as the potential source for different biological activities. Details of the intermolecular interactions and the electron densities in the regions in question were examined.

Peter Luger

Heinz-Jürgen Schmidt

Comparative electron density study on three compounds obtained from Ilex cornuta leaves and known for their anti-adipogenic properties

苦丁茶（Ilex cornuta）叶中三种已知具有抗脂肪生成特性的化合物的电子密度比较研究

Abstract Propiolamide and cellocidin were investigated in superacidic media. In both acetylenic amides, the amide moiety is immediately monoprotonated in anhydrous HF, HF/SbF 5 and HF/BF 3 . An increase of SbF 5 does not lead to a more highly protonated species. The salts were characterized by low-temperature Raman, NMR and room temperature IR spectroscopy, as well as by single-crystal X-ray diffraction. The experimental data are discussed together with results of quantum-chemical calculations on the M06-2X/aug- cc -pVTZ level of theory, which are consistent with the observation of pure monoprotonation. The second protonation of the amide moiety or the triple bond is not observed due to the high positive charge caused by the monoprotonation.

Dirk Hollenwäger

Niklas Kölbl

Alexander Nitzer

Valentin Bockmair

Andreas J. Kornath

The structure and properties of monoprotonated propiolamide and diprotonated cellocidin

单质子化丙炔酰胺和双质子化赛洛西丁的结构与性质

Abbreviation	Z. Naturforsch. B
Journal Impact	0.82
Quartiles(Global)	CHEMISTRY, ORGANIC(Q4)

ISSN	0932-0776, 1865-7117
h-index	52

Publication Information	Publisher: Walter de Gruyter GmbH，Publishing cycle: Monthly，Journal Type: journal，Open Access Journals: No
Basic data	Year of publication: 1947，Proportion of original research papers: 100.00%，Self Citation Rate:12.50%， Gold OA Rate: 7.92%
Average review cycle	网友分享经验：一般,3-8周
Average recruitment ratio	网友分享经验：容易

Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences

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Polyphosphoric acid (PPA): a new, highly efficient catalyst for the synthesis of functionalized azepino phthalazine hybrids

The stannides SrPdSn and m-BaPtSn

Two further members of the triclinic lanthanoid(III) chloride oxoarsenate(III) series Ln ₃Cl₂[AsO₃][As₂O₅] with Ln = Eu and Gd

Comparative electron density study on three compounds obtained from Ilex cornuta leaves and known for their anti-adipogenic properties

The structure and properties of monoprotonated propiolamide and diprotonated cellocidin

Polyphosphoric acid (PPA): a new, highly efficient catalyst for the synthesis of functionalized azepino phthalazine hybrids

Comparative electron density study on three compounds obtained from Ilex cornuta leaves and known for their anti-adipogenic properties

Two further members of the triclinic lanthanoid(III) chloride oxoarsenate(III) series Ln ₃Cl₂[AsO₃][As₂O₅] with Ln = Eu and Gd

The stannides SrPdSn and m-BaPtSn

The structure and properties of monoprotonated propiolamide and diprotonated cellocidin