Synthesis and crystal structure solution of potassium dawsonite: An intermediate compound in the alkaline hydrolysis of calcium aluminate cements

2005 ◽  
Vol 35 (4) ◽  
pp. 641-646 ◽  
Author(s):  
L. Fernández-Carrasco ◽  
F. Puertas ◽  
M.T. Blanco-Varela ◽  
T. Vázquez ◽  
J. Rius
Keyword(s):  
Crystal Structure ◽  
Calcium Aluminate ◽  
Alkaline Hydrolysis ◽  
Intermediate Compound ◽  
Synthesis And Crystal Structure ◽  
Structure Solution ◽  
Hydrolysis Of

scholarly journals New Mononuclear Complex of Europium(III) and Benzoic Acid: From Synthesis and Crystal Structure Solution to Luminescence Emission

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 674
Author(s):  
Carlos Hernández-Fuentes ◽  
Rosario Ruiz-Guerrero ◽  
Angel de Jesús Morales-Ramírez ◽  
Paulina Molina-Maldonado ◽  
Dulce Y. Medina-Velazquez
Keyword(s):  
Crystal Structure ◽  
Benzoic Acid ◽  
Coordination Sphere ◽  
Luminescent Properties ◽  
Mononuclear Complex ◽  
Synthesis And Crystal Structure ◽  
Mononuclear Complexes ◽  
Structure Solution ◽  
Carboxylic Groups ◽  
Structure Result

This study presents a general method which can be used for the synthesis of mononuclear complexes with europium(III) and organic ligands with carboxylic groups. It describes the procedure for preparing a new mononuclear coordination complex with europium(III) and carboxylate ligands sourced from benzoic acid. The construction of mononuclear complexes with a coordination sphere saturated in carboxylic ligands must go through the preparation and purification of a europium(III) intermediate complex that presents a coordination sphere with anions that will be later exchanged for carboxylic groups and finally precipitated as a solvent-free or anion-free complex within the coordination sphere. The detailed synthesis procedure for powders of a new complex, as well as studies of its structural composition at each phase and luminescent properties, are detailed in this study. Analytical and spectroscopic data reveal the formation of a new mononuclear complex of the general formula [Eu(OOCC6H5)3·(HOOCC6H5)2]. The crystal structure of the Eu(III) complex was solved using X-ray powder diffraction data and EXPO2014 software, and the crystal structure result was deposited in the CCDC service with number 19771999.

scholarly journals The Synthesis and Crystal Structure of N-tert-Butyl-3-(tert-butylimino)-2-nitropropen-1 -amine

1993 ◽  
Vol 48 (8) ◽  
pp. 1138-1142 ◽  
Author(s):  
Daryl L. Ostercamp ◽  
Lisa M. Preston ◽  
Kay D. Onan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Solid State ◽  
Unit Cell ◽  
Monoclinic Space Group ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
Tert Butyl ◽  
Intramolecular Hydrogen ◽  
Hydrolysis Of

The unit cell of N-tert-butyl-3-(tert-butylimino)-2-nitropropen-1-amine (4) is monoclinic, space group P21/C, with a = 9.669(4), b = 16.415(6), c = 17.341 (7) Å, and Z = 4. Hydrolysis of 4 leads to (E)-3-(N-tert-butylamino)-2-nitro-2-propenal (5), whose unit cell is monoclinic, space group P21/n, with a = 6.821(1), b = 20.707(6), c = 6.303(1)Å, and Z = 4. Compounds 4 and 5 both possess C2 symmetry in the solid state, their “U-shaped” conjugated cores being essentially planar. In each case this planarity is enforced by an intramolecular hydrogen bond.

Synthese und Kristallstruktur des funktionalisierten Molybdän(VI)- Alkin-Komplexes [MoCl4(Ph – C ≡ C-Se- C4H9)(SEt2)] / Synthesis and Crystal Structure of the Functionalized Molybdenum Alkyne Complex [MoCl4(Ph-C≡C-Se-C4H9)(SEt2)]

1996 ◽  
Vol 51 (7) ◽  
pp. 1049-1052 ◽  
Author(s):  
Michael Platea ◽  
Kurt Dehnicke ◽  
Sonja Abram ◽  
Ulrich Abramb
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Ir Spectroscopy ◽  
Sulfur Atom ◽  
Structure Determination ◽  
Molybdenum Atom ◽  
Dichloromethane Solution ◽  
Synthesis And Crystal Structure ◽  
Bond Lengths ◽  
Structure Solution

[MoCl4(Ph-C≡C-Se-C4H9)(SEt2)] has been prepared by the reaction of trans-[MoCl4(SEt2)2] with Ph-C≡C-Se-C4H9 in dichloromethane solution. The complex was characterized by IR spectroscopy and by a crystal structure determination. Space group P21/c. Z = 4. structure solution with 4595 independent reflections. R = 0.057 for reflections with I > 2σ(I). Lattice dimensions at -65°C: a = 1002.8(2). b = 730.74(5), c = 2703.1(7) pm. β = 95.78(1)°. The complex has a molecular structure in which the molybdenum atom is seven-coordinate by four chlorine ligands, by the two alkyne carbon atoms, and in irons position to the latter by the sulfur atom of the thioether molecule. The MoC bond lengths of 190.2 and 200.9 pm are surprisingly different.

A new insight on alkaline hydrolysis of calcium aluminate cement concrete: Part I. Fundamentals

1996 ◽  
Vol 11 (7) ◽  
pp. 1748-1754 ◽  
Author(s):  
S. Goñi ◽  
C. Andrade ◽  
J. L. Sagrera ◽  
M. S. Hernández ◽  
C. Alonso
Keyword(s):  
Calcium Aluminate ◽  
Alkaline Hydrolysis ◽  
Degradation Process ◽  
Calcium Aluminate Cement ◽  
X Ray Diffraction ◽  
Cement Concrete ◽  
X Ray ◽  
Concrete Part ◽  
Hydrolysis Of ◽  
Aluminate Cement

In this work a hypothesis to explain the alkaline hydrolysis degradation process of calcium aluminate cement concrete (CACC) is presented. The hypothesis is based on x-ray diffraction (XRD) data of some samples taken from real Spanish CACC structures. The identification from XRD data of a hydrated alkaline aluminate could serve as a guide to differentiate both processes of normal carbonation and alkaline hydrolysis.

Synthese und Kristallstruktur von [TeCl2(NPMe3)2]2/ Synthesis and Crystal Structure of [TeCl2(NPMe3)2]2

1995 ◽  
Vol 50 (4) ◽  
pp. 573-576 ◽  
Author(s):  
Hella Folkerts ◽  
Kurt Dehnicke ◽  
Jörg Magull
Keyword(s):  
Crystal Structure ◽  
Ir Spectroscopy ◽  
Structure Determination ◽  
Acetonitrile Solution ◽  
Trans Position ◽  
Synthesis And Crystal Structure ◽  
Bond Lengths ◽  
Structure Solution ◽  
In Trans ◽  
Moisture Sensitive

[TeCl2(NPMe3)2]2 has been prepared by the reaction of TeCl4 with Me3SiNPMe3 in acetonitrile solution. Tlie compound forms white moisture sensitive crystals which have been characterized by IR spectroscopy and by a crystal structure determination. Space group P21/c, Z = 2, structure solution with 3510 independent reflections, R = 0.029. Lattice dimensions at - 70 °C; a = 1206.0(9); b = 1054.7(7); c = 1156.0(6) pm; β = 99.27(5)°. [TeCl2(NPMe3)2]2 forms centrosymmetric molecules via TeCl2Te bridges with bond lengths Te-Cl of 267.2 and 366.9 pm, the longer one being in trans-position to one of the terminally bounded (NPMe3-) groups. The TeN bond lengths of 190.1 and 192.6 pm are unusually short.

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