Boron-nitrogen compounds. 116. Preparation and crystal structure of a new type of triply bridged pyrazabole

AbstractA new type of inclusion complex, S(–)-1 phenyl ethyl ammonium percholorate complex of R-(–)-2-ethyl - N - benzyl - 4, 7, 10, 13 - tetraoxa -1- azacyclopentadecane, has been prepared and studied by NMR, IR and single crystal X-ray diffraction techniques. The compound crystallizes in space group

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Boron Nitrogen Compounds

10.21236/ada470363 ◽

1962 ◽

Cited By ~ 1

Author(s):

Riley Schaeffer

Keyword(s):

Nitrogen Compounds ◽

Boron Nitrogen

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A 2-D Zn(II) coordination polymer based on 4,5-imidazoledicarboxylate and bis(benzimidazole) ligands: synthesis, crystal structure and fluorescence properties

Zeitschrift für Naturforschung B ◽

10.1515/znb-2021-0003 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Xinzhao Xia ◽

Lixian Xia ◽

Geng Zhang ◽

Yuxuan Jiang ◽

Fugang Sun ◽

...

Keyword(s):

Crystal Structure ◽

Coordination Polymer ◽

Zigzag Chain ◽

Supramolecular Framework ◽

X Ray Diffraction ◽

Hydrothermal Conditions ◽

Hydrogen Bond Interaction ◽

X Ray ◽

New Type ◽

Solid State Fluorescence

Abstract In this work, a new type of zinc(II) coordination polymer {[Zn(HIDC)(BBM)0.5]·H2O} n (Zn-CP) was synthesized using 4,5-imidazoledicarboxylic acid (H3IDC) and 2,2-(1,4-butanediyl)bis-1,3-benzimidazole (BBM) under hydrothermal conditions. Its structure has been characterized by infrared spectroscopy, elemental analysis and single crystal X-ray diffraction analysis. The Zn(II) ion is linked by the HIDC2− ligand to form a zigzag chain by chelating and bridging, and then linked by BBM to form a layered network structure. Adjacent layers are further connected by hydrogen bond interaction to form a 3-D supramolecular framework. The solid-state fluorescence performance of Zn-CP shows that compared with free H3IDC ligand, its fluorescence intensity is significantly enhanced.

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Boron-nitrogen compounds. 99. Studies on B-(pyrazol-1-yl)pyrazaboles

Inorganic Chemistry ◽

10.1021/ic00191a009 ◽

1984 ◽

Vol 23 (23) ◽

pp. 3713-3716 ◽

Cited By ~ 12

Author(s):

Kurt Niedenzu ◽

Philipp M. Niedenzu

Keyword(s):

Nitrogen Compounds ◽

Boron Nitrogen

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A New Class of Oxide Superconductor (Nd, Ce, Sr)2CuO4

MRS Proceedings ◽

10.1557/proc-156-383 ◽

1989 ◽

Vol 156 ◽

Author(s):

E. Takayama-Muromachi

Keyword(s):

Crystal Structure ◽

Crystal Chemistry ◽

Superconducting Phase ◽

Type Structure ◽

Oxide Superconductor ◽

New Class ◽

System 2 ◽

New Type ◽

System 1 ◽

Tetragonal Cell

ABSTRACTSince the discovery of the high-Tc superconductor in the La-Ba-Cu-O system [1], a great deal of experimental and theoretical effort have been made to clarify the nature of the Cu-based oxides. In order to elucidate mechanism of the high-Tc superconductivity, discovery of a new type of superconductor is no doubt of great importance. Recently, Akimitsu et al. found a new oxide superconductor in the Nd-Ce-Sr-Cu-O system [2]. Soon after their discovery, the superconducting phase was isolated and identified [3]. It has a tetragonal cell with space group P4/nmm and has a structure closely related to but different from the K2NiF4− or T'-Nd2CuO4− -type structure. Although, Tc of the Nd-Ce-Sr-Cu oxide is not so high (ca. 20 K) compared with the 1–2–3 or Bi(Tl)-based superconductors, it has aroused interest widely due to a very simple crystal structure. In this article, I will discuss superconductivity and crystal chemistry of the Nd-Ce-Sr-Cu oxide. Also, various compounds isostructural to it will be presented.

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Spin-Spin Coupling Constants 1J(15N,11B) in Boron-Nitrogen Compounds. Experimental Data and DFT Calculations

Zeitschrift für Naturforschung B ◽

10.1515/znb-2007-0213 ◽

2007 ◽

Vol 62 (2) ◽

pp. 220-224 ◽

Cited By ~ 11

Author(s):

Bernd Wrackmeyer ◽

Oleg L. Tok

Keyword(s):

Experimental Data ◽

Coupling Constants ◽

Spin Coupling ◽

Positive Sign ◽

Nitrogen Compounds ◽

Dft Methods ◽

Spin Coupling Constants ◽

Fermi Contact ◽

Spin Spin Coupling ◽

Boron Nitrogen

Boron-nitrogen compounds were studied with respect to indirect nuclear 15N-11B spin-spin coupling (1J(15N,11B)). Some new experimental data were determined for aminoboranes and tetra-Npyrrolylborate, and a variety of compounds with B-N single, double and triple bonds were examined using DFT methods for the calculation of 1J(15N,11B) at the B3LYP/6-311+G(d,p) level of theory. The calculations predict magnitude and sign of 1J(15N,11B) reasonably well, and the Fermi contact term was found to be dominant. A positive sign of 1J(15N,11B) was calculated in the case of 1-azacloso- dodecaborane(12), in contrast to all other compounds studied.

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