نتایج جستجو برای: polymorph

تعداد نتایج: 2081  

Journal: :Acta crystallographica. Section C, Structural chemistry 2015
T Stanley Cameron J Stuart Grossert Chad R Maheux Idralyn Q Alarcon Catherine R Copeland Anthony Linden

A second polymorph of the hydrochloride salt of the recreational drug ethylone, C12H16NO3(+)·Cl(-), is reported [systematic name: (±)-2-ethylammonio-1-(3,4-methylenedioxyphenyl)propane-1-one chloride]. This polymorph, denoted form (A), appears in crystallizations performed above 308 K. The originally reported form (B) [Wood et al. (2015). Acta Cryst. C71, 32-38] crystallizes preferentially at r...

Journal: :Acta Crystallographica Section E Structure Reports Online 2009

Journal: :Acta Crystallographica Section E Structure Reports Online 2005

2010
Erpan Zhang Sangen Zhao Jianxiu Zhang Peizhen Fu Jiyong Yao

Crystals of β-Zn(3)(BO(3))(PO(4)) have been grown by the Kyropoulos method. The asymmetric unit contains three Zn sites, three B-atom sites (all with symmetry 3), two P sites (both with m symmetry) and nine O-atom sites (four with m symmetry). The fundamental building units of the title structure are isolated BO(3) triangles and PO(4) tetra-hedra, which are bridged by ZnO(4) tetra-hedra or ZnO(...

2009
Jung-Ah Kim Gi-Chun Han Mihee Lim Kwang-Suk You Miyoung Ryu Ji-Whan Ahn Toyohisa Fujita Hwan Kim

Wt% of aragonite, a CaCO(3) polymorph, increased with higher hydraulic activity ( degrees C) of limestone in precipitated calcium carbonate (PCC) from the lime-soda process (Ca(OH)(2)-NaOH-Na(2)CO(3)). Only calcite, the most stable polymorph, was crystallized at hydraulic activity under 10 degrees C, whereas aragonite also started to crystallize over 10 degrees C. The crystallization of PCC is ...

2010
Primjira P. Tadbuppa Edward R. T. Tiekink

The title compound, [Au(C(9)H(10)NOS)(C(18)H(33)P)], represents a monoclinic polymorph to complement a previously reported triclinic (P) polymorph [Hall et al. (1993 ▶). Aust. J. Chem.46, 561-570 (unit-cell data only)]. The Au(I) atom is coordinated within an S,P-donor set that defines a slightly distorted linear geometry [S-Au-P = = 175.43 (3)°], with the distortion due in part to a close intr...

Journal: :Acta Crystallographica Section E Structure Reports Online 2013

Journal: :Acta crystallographica. Section C, Crystal structure communications 2011
Rodrigo S Corrêa Angélica E Graminha Javier Ellena Alzir A Batista

A new triclinic polymorph of the title compound, [PdCl(2)(C(18)H(15)P)(2)], has two independent molecules in the unit cell, with the Pd atoms located on inversion centres. One molecule has an eclipsed conformation, whereas the second molecule adopts a gauche conformation. The molecules with a gauche conformation are involved in weak intermolecular C-H···Cl-Pd interactions with symmetry-related ...

2011
Hai-Wei Kuai Xiao-Chun Cheng

We reported recently the first polymorph of the title compound [Kuai & Cheng (2011a ▶). Acta Cryst., E67, o2787]. A second polymorph of the title compound, C(15)H(12)N(2)O(2), was unexpectedly obtained by the hydro-thermal reaction of the title compound with manganese chloride in the presence of potassium hydroxide at 413 K. The benzimidazole ring system is almost planar, with a maximum deviati...

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