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1.
The structure of the title compound C18H20N2O5, was determined by X-rays atT=290 K.M r =344.366, monoclinic, space groupP21/c,a=15.589(4),b=7.619(1),c=16.792(4) Å, =111.47(2)°,V=1856.1 Å3,Z=4,D x =1.23 Mg m–3. CuK radiation (graphite crystal monochromator, =1.54178 Å),(CuK)=7.17 cm–1,F(000)=728. Final conventionalR-factor=0.075,R w =0.106 for 2266 observed reflections and 274 variables. The structure was solved usingMultan.  相似文献   

2.
C38H35Cl2O2P2Re,M r=842, triclinic,P¯1,a=17.71(2),b=11.33(1),c=9.82(1) Å,=114.60(3),=90.84(3), =78.05(3),V=1747(2) Å3,D m(flotation)=1.60,D x=1.60 Mg m–3 forZ=2, MoK, =0.7107 Å,=41.6 cm–1,F(000)=836, room temperature. The structure was solved by standard methods from diffractometer data and refined to a conventionalR of 3.4% for 5412 observed reflections. The Re atom is six coordinate octahedral withtrans-Cl atoms andtrans-Ph3P groups. Relevant bond distances are: Re-P 2.533(1) and 2.535(1) Å, Re-O(ethoxo) 1.888(4) Å, and Re-O(oxide) 1.699(4) Å. The ethyl chain is partially disordered.  相似文献   

3.
The crystal and molecular structure of the title compound, C20H32N2O3, has been determined from X-ray diffraction data using CuK radiation (=1.5418 Å). The compound crystallizes in triclinic space groupP1¯ with a=8.828(1),b=18.680(1),c=6.272(2)Å, =93.42(1), =0.24(2), =77.93(1)°,V=1009.4(2)Å3, andZ=2. The structure was solved by direct methods and the full-matrix least-squares refinement leads the finalR-factor to 0.065 for 3481 observed reflections withI3(I). The phenyl ring is planar and the morpholino rings assume perfect chair conformation. The molecules are held together by van der Waals forces.DCB Contribution No. 810.  相似文献   

4.
X-ray structural data are reported for 2,6-dimethyl-piperidinium-2-hydroxybenzoate (C14H21NO3, orthorhombic,P2121,21, (19);a=7.983(1)Å,b=12.680(2)Å,c=13.838(2)Å;Z=4;R=0.042) and for two polymorphs of 2,6-dimethylpiperidinium-2-hydroxythiobenzoate (C14H21NO2S), an-form (monoclinic,P21/n (14);a=8.005(4)Å,b=22.150(2)Å,c=8.672(4)Å,=101.91(6)°;Z=4;R=0.059) with an intramolecular O-HS hydrogen bond, and a-form (orthorhombic,P212121 (19);a=8.188(1)Å,b=14.781(2)Å,c=24.163(4)Å;Z=8;R=0.15) with an intramolecular O-HO hydrogen bond. The intra-and intermolecular hydrogen bond patterns are discussed, including the literature data of 2,6-dimethylpiperidinium-2-hydroxydithiobenzoate.  相似文献   

5.
A new rhodium(III) complex of an amine-phenol ligand N,NN-bis-(2-hydroxybenzyl)1,3-diaminopropane was synthesized and characterized by X-ray diffraction studies. Diffraction data were collected by the-2 scan method using MoK. radiation. The structure was solved by conventional methods resulting in a final R factor of 0.037 for 1954 independent reflections (F o >2(F o )). The structure consists of a dinuclear complex with two -hydroxy bridges between the two Rh atoms. The overall charge of the molecule is neutral due to deprotonation of all phenolic groups. Crystal data: triclinic, space groupP¯1,a=7.308(3)Å;b=9.586(3)Å,c=12.686(5)Å, =87.51(2), =88.28(2), =71.70(3)°,V=866.6(6)Å3;Z=2.  相似文献   

6.
The crystal structure of the title compound has been determined by X-ray analysis. Crystal data: triclinic,P¯1, C20H22O4,M r =326,39,a=8.296(1),b=10.704(2),c=11.186(1) Å,=112.58(1),=100.81(1), =95.79(1)°,V c =884.38(8) Å3,D x =1.225 g·cm–1, (CuK)=1.54178 Å,=6.05 cm–1,F(000)=384, room temperature,R=0.082 for 2410 unique reflections withF4 F. The conformation of the 3-methoxy-B-nor-5,7-seco-1,3,5(10), 9(11)-estrapent-14-en-17-one-8--ethyl carboxylate (1a) molecule is similar to that of the estranes. Since theB ring is not closed, the rotation around the C(9)-C(10) bond is possible and torsion of the molecule is observed.  相似文献   

7.
The isomorphous cadmium(II) oxalate trihydrate (I) and lead(II) oxalate trihydrate (II) crystals belong to space groupP¯1 withZ=2. The crystallographic parameters for compoundI are:a=6.006(1),b=6.663(1),c=8.497(1)Å,a=74.76(1),=74.39(1), =80.94(1)°, andR=0.028 for 2643 observed MoK reflections; forII:a=6.008(1),b=6.671(1),c=8.493(1)Å,a=74.70(1),=74.33(1), =80.98(1)°, andR=0.065 for 4536 reflections. In the crystal structure, the metal atom is surrounded by seven oxygen atoms (including two aqua ligands) in the form of a distorted pentagonal bipyramid. The coordination polyhedra are interconnected through bridging oxalate groups to form a thick layer matching the (020) plane. Adjacent layers are further linked by hydrogen bonds involving both ligand and lattice water molecules to generate a three-dimensional network.On leave from Central Laboratory, Nankai University, Tianjin, China.  相似文献   

8.
The crystal structure of the title compound, tetrabutylammonium bis(2-thioxo-1,3-dithiole-4,5-dithiolato)nickelate(III), [N(C4H9)4][Ni(C3S5)2], is the fourth known phase of this polymorphous compound. It is monoclinic space group P21/c, with a = 20.040(2) Å, b = 13.1151(17) Å, c = 12.1093(15) Å, = 105.456(15)°, and V = 3067.5(6) Å3 with Z = 4, for D calc = 1.503 g cm–3. The [Ni(dmit)2] anion packing arrangement consists of arrays of side-on touching anions and these arrays are connected via head-to-tail close S S contacts.  相似文献   

9.
C22N2O5H32,M r =404.5, monoclinic,C2,a=21.781(5),b=5.065(1),c=22.333(4)Å,=112.81(2)°,V=2271.1(9)Å3,D calc=1.148 g cm3, (CuK )=1.5418 Å,=5.89 cm–1,F(000)=848, room temperature,R=0.058 for 2178 unique reflections [I2.5(I)]. The peptide linkage is in thetrans conformation. The molecule adopts the-sheet structure. The crystal structure is stabilized by a three-dimensional network of N-HO and C-HO hydrogen bonds.DCB Contribution No. 813.  相似文献   

10.
A crystalline modification of the title compound (C17H19NO4) was determined by three-dimensional X-ray analysis from diffractometer data. Crystal data: monoclinic,Cc,a=15.997(12) Å,b=7.929(7) Å,c=14.664(11) Å,=118.70(5)°,Z=4;Dx=1.227 Mg m–3,(MoK)=0.094 mm–1. FinalR=0.068 for 852 observed reflections. The dimethylphenyl ring is strongly twisted (94.9°) with respect to the amidic plane of the molecule, which almost coincides with the furan ring (6.9°).  相似文献   

11.
MPN: C18H27N3O3,M r=333.43, monoclinic,P21/n. a=6.207(2),b=21.893(6),c=13.693(3) Å; =96.12(2)o,V=1850.1(8) Å3.,Z=4,D cal=1.20 mg/m3,F(000)=720, (CuK)=1.5418 Å, andT=298K.R=0.042 andwR=0.049 for 1675 observed reflections. MMN: C16H23N3O5,M r=337.38, triclinic,P,a=9.642(1) Å,b=10.123(5) Å,c=9.341(2) Å, =93.00(3)o, =90.96(1)o, =110.46(1)o, V=852.5(5) Å3,D cal=1.31 mg m–3.F(000)=360,Z=2, (CuK)=1.5418 Å,R=0.054 andwR=0.074 for 2804 observed reflections. The piperidine and morpholino rings assumechair conformation and orient each other at an angle of 44.8(1)o (MPN) and 47.1(1)o (MMN), respectively.Contribution No. 827 from DCB.  相似文献   

12.
In 6-nitrobenzo(a)pyrene, an environmental pollutant, the nitro substituent lies at 69.5(1) to the mean plane of the aromatic moiety. The C–C bond distances range from 1.341(3) to 1.443(3) Å. The crystal is in the monoclinic space group, P21/c, with a = 8.3239(3) Å, b = 8.9530(3) Å, c = 18.0678(5) Å, = 99.264(2) and Z = 4. Molecules are assembled in sheets in the unit cell through stacking and alternating C–H O interactions.  相似文献   

13.
The title compound is orthorhombic,M r =590.2,P212121 (No. 19),a=9.865(2),b=9.924(2),c=31.202(7) Å,V=3055(2) Å3,Z=4,D x =1.283 g cm–3, (MoK );F(000)=1256; (MoK )=6.76 cm–1, finalR=0.052 for 1441 reflections I2.5(I). The nitrite group is chelated via the two oxygen atoms; the two six-membered rings resulting from the coordination of the 1,3-propanediamine ligands to the nickel(II) atom are in the chair conformation. The Ni-N and Ni-O distances average 2.07(1) and 2.14(2) Å respectively. The two Ni-O distances are nearly equivalent.  相似文献   

14.
X-ray crystallographic studies of the two title compounds have shown that the molecules crystallize in the same triclinic space group, , with very similar cell dimensions. For C21H21BrO4,a=12.056(5),b=13.206(5),c=7.595(3)Å, =90.38(3), =106.07(3) and =124.42(3)° and for C21H23BrO3,a=12.076(6),b=13.090(5),c=7.490(3)Å, =92.65(5), =104.90(5) and =124.55(5)°. Both compounds possess the oxabicyclo[3.2.1]octane bridged ring system and differ only at the carbon to the ring oxygen where the Csp3 in the ether is replaced by Csp2=O in the lactone. Both cyclohexane rings adopt distorted chair conformations and the lactone and ether rings approximate closely to the envelope conformation. The bromine substituent at C(4) results in distortion of the naphthalene ring. Both molecules pack with the naphthalene rings parallel to each other with interplanar spacings of 3.71 Å in the ether and 3.66Å in the lactone.  相似文献   

15.
The X-ray structure of the biologically most active polymorph (Form II) of 5-methoxysulfadiazine (1) and that of the 11 complex between this sulfonamide and acetylsalicylic acid (2) are reported. The polymorph1 is monoclinic, space groupP21/c witha=13.086(2) Å,b=5.583(1) Å,c=17.222(3) Å, =99.98(1)°,Z=4 and occurs as centrosymmetric hydrogen bonded (N–H...N) dimers in the crystal. This arrangement differs from that observed in other polymorphs of the drug. Complex2 is triclinic, ,a=8.102(1)Å,b=12.033(1) Å,c=12.170(2) Å, =111.67(1)°, =93.77(1)°, =103.82(1)°,Z=2. Complexation involves linear intermolecular hydrogen bonds, N–H...O=C and N...O–H, between the amide group and pyrimidinyl N atom of the sulfonamide and the carboxylic group of the acetylsalicylic acid. On complexation to form2, neither molecular component undergoes any major structural change.  相似文献   

16.
The crystal structure of (5-C5H5)2Hf(1-NC4H4)2 has been determined from X-ray data measured by counter methods. The title compound is isostructural with (5-C5H5)2Zr(1-NC4H4)2, and crystallizes in the monoclinic space groupP21/c (C 2h 5 , No. 14) with unit cell constantsa=9.605(3),b=8.174(3),c=19.487(4) Å, =90.85(3)°, andZ=4 forD c=1.91 gcm–3. Full-matrix least-squares refinement gave a finalR value of 0.068 for 2154 independent observed reflections. The two cyclopentadienyl rings are 5-coordinated to the hafnium atom at an average Hf-C(5–) distance of 2.51(1) Å. The Hf-N-centroid (-pyrrolyl) angles average 166°.  相似文献   

17.
The X-ray structure oftrans-(2,6-lutidine)2PdCl2 has been determined. Golden orange crystals of the complex crystallize in the triclinic space group , with cell dimensionsa=7.6950(8),b=7.9705(10),c=8.0485(8)Å, =116.967(9), =113.343(8), and =93.836(9)°;V=385.18(7)Å3 andZ=2. 1336 unique reflections withI net>3 (I) on refinement afforded values ofR=0.018 andR w=0.023.  相似文献   

18.
Crystal structure of the title compound belonging to the group of-acylimino derivatives of sulfur(II) compounds has been determined by X-ray structure analysis. The crystals are monoclinic, P21/c,a=11.210(2),b=8.197(1),c=13.659(2) Å,=102.36(2)°,V=1226.0(3) Å3,Z=4,D x =1.61 g cm–3, (MoK)=0.71069 Å,=6.3 cm–1. The structure has been refined to a finalR value of 0.035 for 1401 observed reflexions.The molecule is nearly planar with symmetrym. The title compound contains a very short intramolecular C=OS contact of 2.328(3) Å, suggesting a bond-non-bond resonance interaction.  相似文献   

19.
The title complex has been prepared, and characterized by X-ray crystallography. The crystals are rhombohedral, space groupR32, witha=20.954(5),c=9.753(1) Å,Z=3, andR F =0.070 for 680 observed MoK reflections. The structure consists of a packing of hexa(3,5-dicarboxypyridine) potassium cations and tetrabromoaurate(III) anions. The potassium atom is surrounded by equivalent oxygen atoms to form a KO6 octahedron with a very short K-O distance of 2.56(1) Å. The AuBr 4 group exhibits orientational disorder with a mean bond length of 2.38(1) Å. Two symmetric strong hydrogen bonds (linear OHO and bent NHN) are found in the crystal structure. The nearly planar organic ligands are interlinked by hydrogen bonds to form parallel sheets which approximately correspond to the (003) family of planes. The potassium atoms lying in between these sheets connect them into a three-dimensional network.On leave from Central Laboratory, Nankai University, Tianjin, China.  相似文献   

20.
The crystal structures of the three fluorene related molecules, (I) 2-(9,9-dipropylfluorene-2-yl)-9,9-dipropylfluorene, [Exalite 384, C38H42], (II) 2-(1,1-dimethylpropyl)-7-{4-[(1,1-dimethylpropyl)-9,9-diethylfluoren-2-yl] phenyl}-9,9-diethylfluorene, [Exalite 404, C50 H58], and (III) 2-(4-ethylphenyl)-7-[7-(ethylphenyl)-9,9-dipropylfluoren-2-yl]-9,9-dipropylfluorene, [Exalite 416, C54H58], have been determined. Structural details reveal a novel new bonding arrangement at the C2 atoms of symmetry-related fluorene moieties in all three molecules producing a linear type array with an inversion center connecting adjacent asymmetric units within each molecule. Exalite 384 is monoclinic, space group P21/c with a = 9.002(2) Å, b = 16.275(4) Å, c = 10.525(1) Å, = 103.05(1), and V = 1502.1(5) Å3 with Z = 4, for d calc = 1.103 g/cm3. Exalite 404 is triclinic, space group P1 with a = 10.383(1) Å, b = 13.404(2) Å, c = 7.7007(9) Å, = 105.296(9), = 104.23(1), = 73.707(9), and V = 974.9(2) Å3 with Z = 2, for d calc = 1.141. Exalite 416 is monoclinic, space group P21/c with a = 15.99(10) Å, b = 11.178(8) Å, c = 23.766(4) Å, = 104.21(4), and V = 4117(4) Å3 with Z = 4, for d calc = 1.141 g/cm3.  相似文献   

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