scholarly journals Crystal structure of pimecrolimus Form B, C43H68ClNO11

2021 ◽  
Vol 36 (1) ◽  
pp. 35-42
Author(s):  
Shivang Bhaskar ◽  
Joseph T. Golab ◽  
James A. Kaduk ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton
Keyword(s):  
Crystal Structure ◽  
Powder Diffraction ◽  
Density Functional ◽  
Van Der Waals Interactions ◽  
Powder Diffraction File ◽  
X Ray ◽  
Weak Intermolecular Interactions ◽  
Significant Difference ◽  
Atomic Coordinates ◽  
Solid State Conformation

The crystal structure of pimecrolimus Form B has been solved and refined using synchrotron X-ray powder diffraction data and optimized using density functional techniques. Pimecrolimus crystallizes in the space group P21 (#4) with a = 15.28864(7), b = 13.31111(4), c = 10.95529(5) Å, β = 96.1542(3)°, V = 2216.649(9) Å3, and Z = 2. Although there are an intramolecular six-ring hydrogen bond and some larger chain and ring patterns, the crystal structure is dominated by van der Waals interactions. There is a significant difference between the conformation of the Rietveld-refined and the DFT-optimized structures in one portion of the macrocyclic ring. Although weak, intermolecular interactions are apparently important in determining the solid-state conformation. The powder pattern is included in the Powder Diffraction File™ (PDF®) as entry 00-066-1619. This study provides the atomic coordinates to be added to the PDF entry.

Crystal structure of tramadol hydrochloride, C16H26NO2Cl

2015 ◽  
Vol 30 (3) ◽  
pp. 242-249 ◽  
Author(s):  
James A. Kaduk ◽  
Kai Zhong ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Powder Diffraction ◽  
Density Functional ◽  
Minimum Energy ◽  
Zigzag Chain ◽  
Powder Diffraction File ◽  
Tramadol Hydrochloride ◽  
X Ray ◽  
Solid State Conformation

The crystal structure of tramadol hydrochloride has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques. Tramadol hydrochloride crystallizes in space group Cc (#9) with a = 9.680 72(2), b = 19.191 27(4), c = 9.285 94(1) Å, β = 100.5923(1)°, V = 1695.795(5) Å3, and Z = 4. The solid-state conformation of the cation differs from the minimum-energy conformation of the tramadol cation in water, and from the conformation observed in the benzoic acid adduct of tramadol hydrochloride. N–H···Cl and O–H···Cl hydrogen bonds form a zigzag chain with graph set C1,2(8) along the c-axis. C–H···O hydrogen bonds also contribute to the crystal energy. The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™.

Crystal structure of paliperidone palmitate (INVEGA SUSTENNA®), C39H57FN4O4

2017 ◽  
Vol 32 (4) ◽  
pp. 222-227
Author(s):  
James A. Kaduk ◽  
Artem O. Dmitrienko ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton
Keyword(s):  
Crystal Structure ◽  
Powder Diffraction ◽  
Density Functional ◽  
Crystal Packing ◽  
Parent Compound ◽  
Ester Group ◽  
Van Der Waals Interactions ◽  
Paliperidone Palmitate ◽  
Powder Diffraction File ◽  
X Ray

The crystal structure of paliperidone palmitate has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques. Paliperidone palmitate crystallizes in space group P21/c (#14) with a = 34.415 40(35), b = 10.093 49(7), c = 10.904 92(9) Å, β = 94.3917(9)°, V = 3776.94(6) Å3, and Z = 4. The conformation of the paliperidone fragment differs from that of the parent compound. The palmitate chain exhibits a slight twist close to the ester group. Several C–H⋅⋅⋅O hydrogen bonds contribute to the crystal packing, which is dominated by van der Waals interactions. The powder pattern is included in the Powder Diffraction File™ as entry 00-066-1614.

Crystal structure of tezacaftor Form A, C26H27F3N2O6

2021 ◽  
Vol 36 (1) ◽  
pp. 56-62
Author(s):  
James A. Kaduk ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Density Functional ◽  
Van Der Waals ◽  
Van Der Waals Interactions ◽  
Powder Diffraction Data ◽  
Powder Diffraction File ◽  
X Ray

The crystal structure of tezacaftor Form A has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques. Tezacaftor Form A crystallizes in space group C2 (#5) with a = 21.05142(6), b = 6.60851(2), c = 17.76032(5) Å, β = 95.8255(2)°, V = 2458.027(7) Å3, and Z = 4. The crystal structure is dominated by van der Waals interactions. O–H⋯O hydrogen bonds link the molecules in chains along the b-axis, and there are a variety of C–H⋯O hydrogen bonds, both intra- and intermolecular. The powder pattern has been submitted to ICDD® for inclusion in the Powder Diffraction File™ (PDF®).

Powder X-ray diffraction of oseltamivir phosphate (Tamiflu®), C16H31N2O8P

2020 ◽  
Vol 35 (3) ◽  
pp. 216-218
Author(s):  
Ryan L. Hodge ◽  
James A. Kaduk ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Powder Diffraction ◽  
Density Functional ◽  
Van Der Waals Interactions ◽  
X Ray Diffraction ◽  
Powder Diffraction File ◽  
X Ray ◽  
Oseltamivir Phosphate ◽  
Phosphate Groups

The crystal structure of oseltamivir phosphate has been refined using synchrotron X-ray powder diffraction data and optimized using density functional techniques. Oseltamivir phosphate crystallizes in space group P21212 (#18) with a = 24.0079(3), b = 24.6716(2), c = 7.45254(5) Å, V = 4414.24(5) Å3 at 295 K, and Z = 8. Prominent in the crystal structure are hydrogen bonds between the phosphate groups and the ammonium groups of the oseltamivir cations. The strong hydrogen bonds link the cations and the anions into columns parallel to the c-axis, with van der Waals interactions between the columns. Thermal expansion between 120 and 295 K is anisotropic. The powder pattern is included in the Powder Diffraction File™ as entry 00-068-1107.

Crystal structure of eltrombopag olamine Form I, (C2H8NO)2 (C25H20N4O4)

2021 ◽  
pp. 1-7
Author(s):  
James A. Kaduk ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Density Functional ◽  
Van Der Waals Interactions ◽  
Powder Diffraction Data ◽  
Powder Diffraction File ◽  
X Ray ◽  
The Third

The crystal structure of eltrombopag olamine Form I has been solved and refined using synchrotron X-ray powder diffraction data and optimized using density functional techniques. Eltrombopag olamine crystallizes in the space group P21/n (#14) with a = 17.65884(13), b = 7.55980(2), c = 22.02908(16) Å, β = 105.8749(4)°, V = 2828.665(11) Å3, and Z = 4. The crystal structure is dominated by columns of hydrogen-bonded cations and anions along the short b-axis. van der Waals interactions bind the columns together. Two H atoms of each ammonium group in the ethanolammonium cations participate in strong hydrogen bonds, and the third H forms weaker bifurcated H-bonds. The powder pattern has been submitted to ICDD® for inclusion in the Powder Diffraction File™ (PDF®).

Crystal structure of edoxaban tosylate monohydrate Form I, (C24H31ClN7O4S)(C7H7O3S)(H2O)

2021 ◽  
pp. 1-7
Author(s):  
James A. Kaduk ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Powder Diffraction ◽  
Density Functional ◽  
Water Molecules ◽  
Powder Diffraction Data ◽  
Powder Diffraction File ◽  
X Ray ◽  
Protonated Nitrogen Atom ◽  
Solid State Conformation

The crystal structure of edoxaban tosylate monohydrate has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques. Edoxaban tosylate monohydrate crystallizes in space group P21 (#4) with a = 7.55097(2), b = 7.09010(2), c = 32.80420(21) Å, β = 96.6720(3)°, V = 1744.348(6) Å3, and Z = 2. The crystal structure consists of alternating layers of edoxaban cations and tosylate anions along the c-axis. The water molecules lie near the sulfonate end of the tosylate anions. The solid-state conformation of the edoxaban cation is determined by intermolecular interactions. The protonated nitrogen atom forms a strong N–H⋯O hydrogen bond to one of the tosylate oxygens. Only one of the water molecule hydrogens acts as a donor in an O–H⋯O hydrogen bond. The tosylate oxygens act as acceptors in a number of C–H⋯O hydrogen bonds. The powder pattern has been submitted to ICDD® for inclusion in the Powder Diffraction File™.

scholarly journals Crystal structure of (E)-doxepin hydrochloride, C19H22NOCl

2021 ◽  
Vol 36 (1) ◽  
pp. 43-49
Author(s):  
Jerry Hong ◽  
Joseph T. Golab ◽  
James A. Kaduk ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Powder Diffraction ◽  
Density Functional ◽  
Powder Diffraction File ◽  
X Ray ◽  
Methylene Groups ◽  
Protonated Nitrogen Atom ◽  
Solid State Conformation ◽  
Additional Hydrogen

The crystal structure of (E)-doxepin hydrochloride has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques. (E)-doxepin hydrochloride crystallizes in space group P21/a (#14) with a = 13.78488(7), b = 8.96141(7), c = 14.30886(9) Å, β = 96.5409(5)°, V = 1756.097(12) Å3, and Z = 4. There is a strong discrete hydrogen bond between the protonated nitrogen atom and the chloride anion. There are six C–H⋯Cl hydrogen bonds between the methyl groups and the chloride, as well as additional hydrogen bonds from methylene groups and the vinyl proton. The hydrogen bonds are important in determining the solid-state conformation of the cation. The compound is essentially isostructural to amitriptyline hydrochloride. The powder pattern is included in the Powder Diffraction File™ as entry 00-066-1613.

Crystal structure of mupirocin form I, C26H44O9

2016 ◽  
Vol 31 (2) ◽  
pp. 118-125
Author(s):  
James A. Kaduk ◽  
Kai Zhong ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton
Keyword(s):  
Crystal Structure ◽  
Powder Diffraction ◽  
Density Functional ◽  
Three Dimensional ◽  
Van Der Waals Interactions ◽  
Hydroxyl Groups ◽  
Powder Diffraction Data ◽  
Powder Diffraction File ◽  
X Ray ◽  
Bond Network

The crystal structure of mupirocin Form I has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques. Mupirocin Form I crystallizes in space group P21 (#4) with a = 12.562 81(16), b = 5.103 63(4), c = 21.713 34(29) Å, β = 100.932(1)°, V = 1366.91(2) Å3, and Z = 2. Although the three hydroxyl groups and the carboxylic acid participate in a three-dimensional hydrogen bond network, the crystal energy appears to be dominated by van der Waals interactions. The Rietveld-refined and density functional optimized structures differ significantly. The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™.

Crystal structure of lacosamide form I, C13H18N2O3

2015 ◽  
Vol 30 (3) ◽  
pp. 224-230
Author(s):  
James A. Kaduk ◽  
Kai Zhong ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Density Functional ◽  
Three Dimensions ◽  
Van Der Waals Interactions ◽  
Powder Diffraction File ◽  
Functional Theory ◽  
X Ray

The crystal structure of lacosamide form I has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques (density functional theory). Lacosamide form I crystallizes in space group P21 (#4) with a = 10.677 73(5), b = 4.799 68(2), c = 13.639 16(9) Å, β = 91.6331(10)̊, V = 698.719(6) Å3, and Z = 2. Van der Waals interactions are important in the crystal structure. Two N–H···O hydrogen bonds form C1,1(4) chains along the b-axis. Several weaker C–H···O hydrogen bonds to the ketone oxygens also contribute to the packing energy. These C–H···O extend both along the b-axis and in the ac-plane, and help link the molecules in three dimensions. The powder pattern has been submitted to International Centre for Diffraction Data for inclusion in the Powder Diffraction File™.

Crystal structure of loteprednol etabonate Form II, C24H31ClO7

2021 ◽  
pp. 1-6
Author(s):  
James A. Kaduk ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Powder Diffraction ◽  
Density Functional ◽  
Hydroxyl Group ◽  
Powder Diffraction File ◽  
Loteprednol Etabonate ◽  
X Ray ◽  
Cl Atom ◽  
Atomic Coordinates

The crystal structure of loteprednol etabonate Form II has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques. Loteprednol etabonate Form II crystallizes in the space group P21 (#4) with a = 11.96312(6), b = 14.91862(5), c = 6.75715(3) Å, β = 94.1584(3)°, V = 1202.796(6) Å3, and Z = 2. The crystal structure is characterized by herringbone layers in the ab-plane. The anisotropic displacement ellipsoid of the Cl atom is not oriented in a way which corresponds to a chemically sensible motion of this atom. The sample suffered damage in the X-ray beam, probably involving photolysis of the C–Cl bond. The most prominent hydrogen bond is the O–H⋯O hydrogen bond between the hydroxyl group and the carbonyl group of the steroid A ring. This hydrogen bond links the molecules into C1,1(9) chains along the b-axis. The powder pattern is included in the Powder Diffraction File™ (PDF®) as entry 00-066-1602; this study will allow inclusion of the atomic coordinates to the PDF entry.

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