scholarly journals New Synthesis and Structure Determination of 13-Aza-4,4,8,8,12,12-hexamethyl-2,6,10-trioxatricyclo[7,3,1,05,13]tridecane

1995 ◽  
Vol 50 (4) ◽  
pp. 667-670 ◽  
Author(s):  
Konstantina Kehagia ◽  
Alexander Dömling ◽  
Ivar Ugi ◽  
Wolfgang Hiller ◽  
Jürgen Riede
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Monoclinic Space Group ◽  
Space Group ◽  
New Synthesis

A new 13-Aza-4,4,8,8,12,12-hexamethyl-2,6,10-trioxatricyclo[7,3,1,05,13]tridecane synthesis and the crystal structure are reported. It crystallizes in the monoclinic space group P21/n with a = 1201.9(1) pm, b = 1436.6(1) pm, c = 1726.2(2) pm, β = 90.74(1)° and Z = 8.

Two lithium tricyanomethanide compounds: syntheses and single-crystal structure determination of LiK[C(CN)3]2 and Li[C(CN)3]·½ (H3C)2CO

2015 ◽  
Vol 70 (3) ◽  
pp. 191-196 ◽  
Author(s):  
Olaf Reckeweg ◽  
Francis J. DiSalvo
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystals ◽  
Structure Determination ◽  
Monoclinic Space Group ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
Cell Parameters ◽  
New Compounds

AbstractThe new compounds LiK[C(CN)3]2 and Li[C(CN)3]·½ (H3C)2CO were synthesized and their crystal structures were determined. Li[C(CN)3]·½ (H3C)2CO crystallizes in the orthorhombic space group Ima2 (no. 46) with the cell parameters a=794.97(14), b=1165.1(2) and c=1485.4(3) pm, while LiK[C(CN)3]2 adopts the monoclinic space group P21/c (no. 14) with the cell parameters a=1265.7(2), b=1068.0(2) and c=778.36(12) pm and the angle β=95.775(7)°. Single crystals of K[C(CN)3] were also acquired, and the crystal structure was refined more precisely than before corroborating earlier results.

Preparation and Crystal Structure Determination of [(C2Η5)4N]2Hg3Cl8

1995 ◽  
Vol 50 (1) ◽  
pp. 66-70 ◽  
Author(s):  
Inge Pabst ◽  
Peter Sondergeld ◽  
Mirjam Czjzek ◽  
Hartmut Fuess
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Structure Analysis ◽  
Structure Determination ◽  
Title Compound ◽  
Monoclinic Space Group ◽  
Space Group ◽  
Coordination Type ◽  
X Ray

The title compound has been prepared in two different ways: First, by boiling single crystals of [(C2H5)4N]HgCl3 in a mixture of n-hexane/n-octane [4:1] at T = 350 K, and second, in a synthesis from stoichiometric quantities of the components. X-ray structure analysis gave the stoichiometry [(C2H5)4N]2Hg3Cl8, monoclinic, space group P21, a = 7.538(3), b = 19.909(6), c = 10.274(3) Å, β = 95.13(1)°, V = 1535.7(9) A3, Z = 2. The basic [Hg3Cl8]2--units form broken zig-zag chains along [100]. The Hg–Cl distances within the [Hg3Cl8]2- clusters range from 2.315(3) to 2.755(4) Å. This is a new coordination type for halomercurates.

Neue Mangan(III)-Fluoridhydrate: Na[MnF4(H2O)2] und Na[MnF4(H2O)2] · H2O / New Fluoride Hydrates of Manganese(III): Na[MnF4(H2O)2] and Na[MnF4(H2O)2] · H2O

1990 ◽  
Vol 45 (5) ◽  
pp. 593-597 ◽  
Author(s):  
Werner Massa ◽  
Roland E. Schmidt
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Teller Effect ◽  
Crystal Structure Determination ◽  
Monoclinic Space Group ◽  
Space Group ◽  
Jahn Teller ◽  
Jahn Teller Effect

Crystalline Na[MnF4(H2O)2] and Na[MnF4(H2O)2] · H2O have been precipitated from aqueous HF solution of MnO(OH) and NaF. The crystal structure determination of the trihydrate (space group C 2/c, Z = 8, α = 1638.1(2), b = 667.6(2), c = 1130.3(1) pm, β = 103.78(1)°; R/wR = 0.038/0.033 for 1696 independent reflections) showed the presence of isolated octahedral trans-[MnF4(H2O)2]- anions with an elongation of the H2O-Mn—OH2 axis due to the Jahn-Teller effect (Mn 1-O 224.6(2), Mn 1—F(mean) 183.7(1); Mn2-0 218.3(2), Mn2— F(mean) 184.7(2) pm). As a consequence, an unusual H-bond geometry is observed with a tetrahedral (instead of trigonal) environment of the coordinated O atoms. Na[MnF4(H2O)2] is monoclinic (space group C 2/m, C 2 or Cm, a = 816.6(4), b = 677.1(1), c = 496.8(2), β = 114.45(3)°), the crystals show twinning and 1-dimensional disorder.

Kristallstruktur von Triphenylmethyliodsulfan (C6H5)3CSI [1] / Crystal Structure of Triphenylmethyliodosulfane (C6H5)3 CSI [1]

1988 ◽  
Vol 43 (4) ◽  
pp. 399-402 ◽  
Author(s):  
Rolf Minkwitz ◽  
Hans Preut ◽  
Jürgen Sawatzki
Keyword(s):  
Crystal Structure ◽  
Bond Length ◽  
Structure Determination ◽  
Monoclinic Space Group ◽  
Space Group

Abstract The crystal structure of (C6H5)3CSI is reported. It is the first structure determination of an iodine sulfane. (C6H5)3CSI crystallizes in the monoclinic space group P21/c with a - 1226.4(7) pm, b = 1398.8(18) pm, c = 941.6(8) pm, β = 96.38(8)° and Z = 4. The sulfur-iodine bond length is 240.6(4) pm corresponding to the sum of the covalent radii with 237 pm. The molecules are linked via short I···S contacts of 321.0(4) pm such that a zig-zag chain is formed.

scholarly journals X-Ray crystal structure of [(?-H)Os2 (CO)4 (SnPh3)2 (?-HSnPh2) (?-dppf)] (dppf = 1,1´-bis (Diphenylphosphino) ferrocene

2014 ◽  
Vol 38 (1) ◽  
pp. 97-101
Author(s):  
Jagodish C Sarker ◽  
Md Saifur Rahman ◽  
Shariff E Kabir ◽  
Tasneem A Siddiquee
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Solid State ◽  
Structure Determination ◽  
Monoclinic Space Group ◽  
Bimetallic Cluster ◽  
Space Group ◽  
X Ray ◽  
Academy Of Sciences

The solid-state molecular structure determination of the bimetallic osmium-tin compound [(?-H)Os2(CO)4(SnPh3)2(?-HSnPh2)(?-dppf)] (1) was carried out to determine the relative orientationof the coordinated ligands. Compound 1 crystallizes in the monoclinic space group P 21/c with a =22.366(7), b = 14.217(4), c = 25.213(8) Å, ? = 98.865(7)°, Z = 8 and V = 7921(4) Å3. It is a 34-electron bimetallic cluster with the Os-Os edge concomitantly bridged by a dppf and two HSnPh2 ligands DOI: http://dx.doi.org/10.3329/jbas.v38i1.20218 Journal of Bangladesh Academy of Sciences, Vol. 38, No. 1, 97-101, 2014

scholarly journals Molekül- und Kristallstruktur von 1.1-Dimethylsilylentitanocendichlorid, (CH3)2Si(C5H4)2TiCl2 / Molecular and Crystal Structure of l,r-Dimethylsilylene Titanocene Dichloride, (CH3)2Si(C5H4)2TiCl2

1981 ◽  
Vol 36 (10) ◽  
pp. 1208-1210 ◽  
Author(s):  
Hartmut Köpf ◽  
Joachim Pickardt
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Structure Determination ◽  
Titanocene Dichloride ◽  
Molecular And Crystal Structure ◽  
Monoclinic Space Group ◽  
Crystal Data ◽  
Space Group ◽  
X Ray ◽  
Structural Dimensions

Abstract The molecular structure of the bridged [1]-titanocenophane 1,1'-dimethylsilylene titanocene dichloride, (CH3)2Si(C5H4)2TiCl2, has been investigated by an X-ray structure determination. Crystal data: monoclinic, space group C2/c, Z = 4, a = 1332.9(3), 6 = 988.7(3), c = 1068.9(3) pm, β = 113.43(2)°. The results are compared with the structural dimensions of similar compounds: 1,1'-methylene titanocene dichloride, CH2(C5H4)TiCl2, with the unbridged titanocene dichloride, (C5H5)2TiCl2 and the ethylene-bridged compound (CH2)2(C5H4)2TiCl2

A strongly chelating bidentate perchlorate. New synthesis route and crystal structure determination of titanium(4+) perchlorate

1986 ◽  
Vol 25 (9) ◽  
pp. 1386-1390 ◽  
Author(s):  
Mohieddine Fourati ◽  
Moncef Chaabouni ◽  
Claude Henri Belin ◽  
Monique Charbonnel ◽  
Jean Louis Pascal ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Crystal Structure Determination ◽  
Synthesis Route ◽  
New Synthesis

scholarly journals The crystal structure of alstonite, BaCa(CO3)2: an extraordinary example of ‘hidden’ complex twinning in large single crystals

2020 ◽  
Vol 84 (5) ◽  
pp. 699-704
Author(s):  
Luca Bindi ◽  
Andrew C. Roberts ◽  
Cristian Biagioni
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Structure Determination ◽  
Unit Cell ◽  
Crystal Structure Determination ◽  
Unit Cell Parameters ◽  
Space Group ◽  
Cell Parameters ◽  
Structure Determinations

AbstractAlstonite, BaCa(CO3)2, is a mineral described almost two centuries ago. It is widespread in Nature and forms magnificent cm-sized crystals. Notwithstanding, its crystal structure was still unknown. Here, we report the crystal-structure determination of the mineral and discuss it in relationship to other polymorphs of BaCa(CO3)2. Alstonite is trigonal, space group P31m, with unit-cell parameters a = 17.4360(6), c = 6.1295(2) Å, V = 1613.80(9) Å3 and Z = 12. The crystal structure was solved and refined to R1 = 0.0727 on the basis of 4515 reflections with Fo > 4σ(Fo) and 195 refined parameters. Alstonite is formed by the alternation, along c, of Ba-dominant and Ca-dominant layers, separated by CO3 groups parallel to {0001}. The main take-home message is to show that not all structure determinations of minerals/compounds can be solved routinely. Some crystals, even large ones displaying excellent diffraction quality, can be twinned in complex ways, thus making their study a crystallographic challenge.

Notizen: Eine neue bicyclische Zinn-Selen-Verbindung. Synthese und Kristallstruktur von [{Cp(CO)2Fe}3ClSn3Se4] / A New Bicyclic Tin Selenium Compound. Synthesis and Crystal Structure of [{Cp(CO)2Fe}3ClSn3Se4]

1993 ◽  
Vol 48 (7) ◽  
pp. 1009-1012 ◽  
Author(s):  
Kurt Merzweiler ◽  
Harald Kraus
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Unit Cell ◽  
Monoclinic Space Group ◽  
Synthesis And Crystal Structure ◽  
Selenium Compound ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants ◽  
Compound Synthesis

[{Cp(CO)2Fe}SnCl3] reacts with Na2Se in THF to form the compound [{Cp(CO)2Fe}3ClSn3Se4] 1. 1 crystallizes in the monoclinic space group P21/n with 4 formula units per unit cell. The lattice constants are α = 1435.2(7), b = 1124.4(4), c = 1972.7(12) pm, β = 94.59(4)°. According to the X-ray structure determination 1 contains a bicyclic Sn3Se4 framework.

Synthesis and characterization of a disordered variant of KB5O7(OH)2

2015 ◽  
Vol 70 (9) ◽  
pp. 649-658 ◽  
Author(s):  
Teresa S. Ortner ◽  
Michael Schauperl ◽  
Klaus Wurst ◽  
Thomas S. Hofer ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
Hydrothermal Synthesis ◽  
Single Crystal ◽  
Structure Determination ◽  
Molar Ratio ◽  
Potassium Cation ◽  
Synthesis And Characterization ◽  
Monoclinic Space Group

AbstractThe potassium pentaborate KB5O7(OH)2 reported herein crystallizes in the monoclinic space group P21/c (no. 14) with the lattice parameters a = 904.8(2), b = 753.2(2), c = 1214.9(5) pm, β = 117.16(2)°, and V = 0.73663(5) nm3 (Z = 4). It is a disordered structural variant of an already known compound with the same composition (a = 766.90(3), b = 904.45(3), c = 1223.04(4) pm, β = 119.132(2)°, and V = 0.74101(5) nm3 (Z = 4)) reported by Wu in 2011. The disorder of the potassium cation in the single crystal structure determination of KB5O7(OH)2 presented here leads to a remarkably elongated a axis and a corresponding reduction of the length of the b axis in comparison to the ordered compound. The disordered variant was obtained through a hydrothermal synthesis from KNO3, B2O3, and Ce(NO3)3·6H2O with a molar ratio of 1:1:0.07.

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