New polymorphic modification of the crystal structure of bromopeganol

2009 ◽  
Vol 50 (2) ◽  
pp. 384-386 ◽  
Author(s):  
R. Ya. Okmanov ◽  
A. G. Tozhiboev ◽  
K. K. Turgunov ◽  
B. Tashkhodzhaev ◽  
N. I. Mukarramov ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Polymorphic Modification

Structural and Proton Conductivity Studies of Fibrous π-Ti2O(PO4)2·2H2O: Application in Chitosan-Based Composite Membranes

2021 ◽  
Author(s):  
Artem A. Babaryk ◽  
Alaa Adawy ◽  
Inés García ◽  
Camino Trobajo ◽  
Zakariae Amghouz ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Proton Conductivity ◽  
Composite Membranes ◽  
Titanium Phosphate ◽  
Polymorphic Modification ◽  
Modification Of Titanium

Although the fibrous polymorphic modification of titanium phosphate, π-Ti2O(PO4)2·2H2O (π-TiP) is known for decades, its crystal structure has remained unsolved. Herewith we report the crystal structure of π-TiP at a...

Crystal structure of a new polymorphic modification of niahite, NH4MnPO4 · H2O

2015 ◽  
Vol 60 (2) ◽  
pp. 198-203 ◽  
Author(s):  
G. V. Kiriukhina ◽  
O. V. Yakubovich ◽  
O. V. Dimitrova
Keyword(s):  
Crystal Structure ◽  
Polymorphic Modification

Crystal growth, crystal structure of new polymorphic modification, β-Bi2B8O15 and thermal expansion of α-Bi2B8O15

2010 ◽  
Vol 183 (2) ◽  
pp. 458-464 ◽  
Author(s):  
R.S. Bubnova ◽  
J.V. Alexandrova ◽  
S.V. Krivovichev ◽  
S.K. Filatov ◽  
A.V. Egorysheva
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion ◽  
Crystal Growth ◽  
Polymorphic Modification

scholarly journals Crystal structure of a polymorph of μ-oxido-bis[(5,10,15,20-tetraphenylporphyrinato)iron(III)]

2019 ◽  
Vol 75 (6) ◽  
pp. 930-933
Author(s):  
Morten K. Peters ◽  
Christian Näther ◽  
Rainer Herges
Keyword(s):  
Crystal Structure ◽  
Coordination Sphere ◽  
Title Compound ◽  
Polymorphic Modification ◽  
Private Communication ◽  
Apical Position ◽  
Acta Cryst ◽  
Square Planar ◽  
Planar Environment

The title compound, [Fe2(C44H28N4O)2O], was obtained as a by-product during the synthesis of FeIII tetraphenylporphyrin perchlorate. It crystallizes as a new polymorphic modification in addition to the orthorhombic form previously reported [Hoffman et al. (1972). J. Am. Chem. Soc. 94, 3620–3626; Swepston & Ibers (1985) Acta Cryst. C41, 671–673; Kooijmann et al. (2007). Private Communication (refcode 667666). CCDC, Cambridge, England]. In its crystal structure, the two crystallographically independent FeIII cations are coordinated in a square-planar environment by the four N atoms of a tetraphenylporphyrin ligand. The FeIII-tetraphenylporphyrine units are linked by a μ2-oxido ligand into a dimer with an Fe—O—Fe angle close to linearity. The final coordination sphere for each FeIII atom is square-pyramidal with the μ2-oxido ligand in the apical position. The crystal under investigation consisted of two domains in a ratio of 0.691 (3): 0.309 (3).

scholarly journals Crystal structure of a new polymorphic modification of Na2Mn3(SO4)4

2019 ◽  
Vol 234 (11-12) ◽  
pp. 697-705 ◽  
Author(s):  
Hamdi Ben Yahia
Keyword(s):  
Crystal Structure ◽  
Structure Refinement ◽  
Building Blocks ◽  
Polymorphic Modification ◽  
Orthorhombic Symmetry ◽  
X Ray Diffraction ◽  
Reaction Route ◽  
Accurate Comparison ◽  
Symmetry Space ◽  
Symmetry Space Group

AbstractThe new polymorph of Na2Mn3(SO4)4 was prepared via solid state reaction route in a powder form and its crystals were grown by self-flux method. The crystal structure was determined from single crystal X-ray diffraction data. This polymorph crystallizes with an orthorhombic symmetry, space group Pbca, with a = 9.8313(4), b = 8.7467(3), c = 29.6004(11) Å, V = 2545.38(17) Å3, Z = 8. Its structure refinement yielded the residual factors R(F) = 0.025 and wR(F2) = 0.065 for 227 parameters and 2605 independent reflections at 2σ(I) level. The use of group-subgroup schemes in the Bärnighausen formalism enabled an accurate comparison of the Pbca- and Cmc 21-polymorphs of Na2Mn3(SO4)4. Both polymorphs contain similar [Mn3(SO4)4]2− building blocks formed of Mn2O11 dimer units and MnO5 trigonal pyramids that are interconnected by sharing corners with the SO4 tetrahedra. However, the stacking of these building blocks along the longest axes of the Pbca- and Cmc 21-structures is different. This induces differences in the coordination of the sodium atoms and in the orientation of the SO4 tetrahedra.

Crystal structure of the second polymorphic modification of cis-pyridine-glycine-platinum(II) dichloride, cis-[Pt(NH2CH2COOH)(C5H5N)Cl2]

1984 ◽  
Vol 24 (6) ◽  
pp. 932-934 ◽  
Author(s):  
I. A. Baidina ◽  
N. V. Podberezskaya ◽  
L. F. Krylova ◽  
V. I. Alekseev ◽  
S. V. Borisov
Keyword(s):  
Crystal Structure ◽  
Polymorphic Modification

scholarly journals The β-form of trans-3-(2-nitrophenyl)prop-2-enoic acid at 130 K

2006 ◽  
Vol 62 (5) ◽  
pp. o2024-o2026 ◽  
Author(s):  
Graham Smith ◽  
Urs D. Wermuth ◽  
David J. Young ◽  
Jonathan M. White
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Carboxylic Acid ◽  
Title Compound ◽  
Enoic Acid ◽  
Polymorphic Modification ◽  
One Dimensional ◽  
Compound C

The crystal structure of a non-centrosymmetric polymorphic modification of the title compound, C9H7NO4, determined at 130 K, shows the presence of 21 screw-generated one-dimensional zigzag chains formed through catemeric C(4) syn–anti carboxylic acid hydrogen-bonding associations.

ChemInform Abstract: Crystal Growth, Crystal Structure of New Polymorphic Modification, β-Bi2B8O15and Thermal Expansion of α-Bi2B8O15.

ChemInform ◽  
2010 ◽  
Vol 41 (19) ◽  
Author(s):  
R. S. Bubnova ◽  
J. V. Alexandrova ◽  
S. V. Krivovichev ◽  
S. K. Filatov ◽  
A. V. Egorysheva
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion ◽  
Crystal Growth ◽  
Polymorphic Modification

Crystal structure of a new polymorphic modification of β-K2[Pd(NO3)4]

2009 ◽  
Vol 50 (2) ◽  
pp. 361-364 ◽  
Author(s):  
S. P. Khranenko ◽  
I. A. Baidina ◽  
S. A. Gromilov
Keyword(s):  
Crystal Structure ◽  
Polymorphic Modification
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