Novel ditopic receptors based on the P2N2 diphosphazane ring: synthesis and x-ray structural characterization of cis and trans bis(crown ether) annelated 1,3,2.lambda.5,4.lambda.5-diazadiphosphetidine 2,4-disulfide

1989 ◽  
Vol 111 (18) ◽  
pp. 7136-7144 ◽  
Author(s):  
Jean Pierre Dutasta ◽  
Jean Paul Declercq ◽  
Carmen Esteban-Calderon ◽  
Bernard Tinant
Keyword(s):  
Crown Ether ◽  
Structural Characterization ◽  
X Ray ◽  
Ditopic Receptors ◽  
Cis And Trans ◽  
Ring Synthesis

scholarly journals Synthesis and structural characterization of new polyether complexes of germanium(II) and tin(II)

2018 ◽  
Vol 96 (6) ◽  
pp. 570-577 ◽  
Author(s):  
Alina M. Secara ◽  
Justin F. Binder ◽  
Ala’aeddeen Swidan ◽  
Charles L.B. Macdonald
Keyword(s):  
Crystal Structure ◽  
Crown Ether ◽  
Water Molecule ◽  
Single Crystal ◽  
Structural Characterization ◽  
X Ray Diffraction ◽  
X Ray

A series of germanium(II) and tin(II) bromide polyether complexes have been synthesized. Specifically, [GeBr([15]crown-5)][GeBr3], [GeBr([18]crown-6)][GeBr3], [GeBr(triglyme)][GeBr3], [GeBr(tetraglyme)][GeBr3], [SnBr([18]crown-6)][SnBr3], [Sn([15]crown-5)2][SnBr3]2, [SnBr(triglyme)][SnBr3], and [SnBr(tetraglyme)][SnBr3] have been fully characterized including by single crystal X-ray diffraction. The synthesis of [GeBr(dibenzo[24]crown-8)][GeBr3] and [GeCl(dibenzo[24]crown-8)][GeCl3] are also reported, along with the crystal structure of the latter’s water adduct, which features a water molecule adjacent to the GeCl+ ion within the cavity of the crown ether.

scholarly journals Synthesis and Structural Characterization of ‘Non-VSEPR’ Structures of Oxo-Tungsten Complex

2011 ◽  
Vol 8 (s1) ◽  
pp. S323-S329
Author(s):  
Shahriare Ghammamy ◽  
Hajar Sahebalzamani
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structural Characterization ◽  
Direct Methods ◽  
Donor Ligands ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cis And Trans

The crystal structure of [(CH3)4N]4[WOCl4F][WO3Cl4] was determined by single crystal x-ray diffraction technique. The crystal is monoclinic, space group C 2/m, with a= 28.23(10) Å, b= 11.60(4) Å,c= 13.48(5) Å, β=118.43(7)°, V= 3886(2)Å3, Z=4. The structure was solved by direct methods and refined by least-squares methods to a final R = 0.0512 for 3825 observed reflections with I>2σ(I). In crystal there are two crystallographic distinct anions, both with cis geometry; the O-W-F and O-W-O angles are 97.5(3)° and 103.1(3) ° respectively. All structures are cis configurations that confirm a preference for angles below 90° and 180° between cis and trans σ-donor ligands, respectively.

New horizons for the structural characterization of stainless steel slags by X-ray powder diffraction

2007 ◽  
Vol 2007 (suppl_26) ◽  
pp. 61-66 ◽  
Author(s):  
B. Peplinski ◽  
B. Adamczyk ◽  
G. Kley ◽  
K. Adam ◽  
F. Emmerling ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Powder Diffraction ◽  
Structural Characterization ◽  
X Ray ◽  
New Horizons

scholarly journals Structural Characterization of Heterodinuclear ZnII-LnIII Complexes (Ln = Pr, Nd) with a Ring-Contracted H2valdien-Derived Schiff Base Ligand

2021 ◽  
Author(s):  
Shabana Noor ◽  
Richard Goddard ◽  
Fehmeeda Khatoon ◽  
Sarvendra Kumar ◽  
Rüdiger W. Seidel
Keyword(s):  
Molecular Structure ◽  
Schiff Base ◽  
Structural Characterization ◽  
Schiff Base Ligand ◽  
Crystal And Molecular Structure ◽  
X Ray ◽  
X Ray Crystallography ◽  
Imidazoline Ring

AbstractSynthesis and structural characterization of two heterodinuclear ZnII-LnIII complexes with the formula [ZnLn(HL)(µ-OAc)(NO3)2(H2O)x(MeOH)1-x]NO3 · n H2O · n MeOH [Ln = Pr (1), Nd (2)] and the crystal and molecular structure of [ZnNd(HL)(µ-OAc)(NO3)2(H2O)] [ZnNd(HL)(OAc)(NO3)2(H2O)](NO3)2 · n H2O · n MeOH (3) are reported. The asymmetrical compartmental ligand (E)-2-(1-(2-((2-hydroxy-3-methoxybenzylidene)amino)-ethyl)imidazolidin-2-yl)-6-methoxyphenol (H2L) is formed from N1,N3-bis(3-methoxysalicylidene)diethylenetriamine (H2valdien) through intramolecular aminal formation, resulting in a peripheral imidazoline ring. The structures of 1–3 were revealed by X-ray crystallography. The smaller ZnII ion occupies the inner N2O2 compartment of the ligand, whereas the larger and more oxophilic LnIII ions are found in the outer O2O2’ site. Graphic Abstract Synthesis and structural characterization of two heterodinuclear ZnII-LnIII complexes (Ln = Pr, Nd) bearing an asymmetrical compartmental ligand formed in situ from N1,N3-bis(3-methoxysalicylidene)diethylenetriamine (H2valdien) through intramolecular aminal formation are reported.

Epitaxial growth and x‐ray structural characterization of Zn1−xFexSe films on GaAs(001)

1988 ◽  
Vol 6 (3) ◽  
pp. 1946-1949 ◽  
Author(s):  
B. T. Jonker ◽  
S. B. Qadri ◽  
J. J. Krebs ◽  
G. A. Prinz
Keyword(s):  
Epitaxial Growth ◽  
Structural Characterization ◽  
X Ray

Structural characterization of nanocrystalline CrOOH·2H2O aerogel by X-ray diffraction

2005 ◽  
Vol 66 (1) ◽  
pp. 81-90 ◽  
Author(s):  
A. Erenburg ◽  
E. Gartstein ◽  
M. Landau
Keyword(s):  
Structural Characterization ◽  
X Ray Diffraction ◽  
X Ray

Synthesis and structural characterization of a magnesium phthalocyanine(3–) anion

2012 ◽  
Vol 16 (01) ◽  
pp. 154-162 ◽  
Author(s):  
Edwin W.Y. Wong ◽  
Daniel B. Leznoff
Keyword(s):  
Absorption Spectrum ◽  
Solid State ◽  
Single Crystal ◽  
Structural Characterization ◽  
Heterometallic Complex ◽  
State Structure ◽  
Solid State Structure ◽  
X Ray ◽  
X Ray Crystallography

The reduction of magnesium phthalocyanine (MgPc) with 2.2 equivalents of potassium graphite in 1,2-dimethoxyethane (DME) gives [K2(DME)4]PcMg(OH)(1) in 67% yield. Compound 1 was structurally characterized using single crystal X-ray crystallography and was found to be a monomeric, heterometallic complex consisting of a μ3-OH ligand that bridges a [MgIIPc3-]- anion to two potassium cations solvated by four DME molecules. An absorption spectrum of 1 confirms the Pc ligand is singly reduced and has a 3–charge. The solid-state structure of 1 does not indicate breaking of the aromaticity of the Pc ligand. Compound 1 is only the second Pc3- complex and the first reduced MgPc to be isolated and structurally characterized.

Synthesis and x-ray structural characterization of the [Rh22(.mu.3-CO)7(.mu.-CO)18(CO)12]4- anion, containing a large close-packed cluster with an ABAC sequence of compact layers

1980 ◽  
Vol 102 (25) ◽  
pp. 7564-7565 ◽  
Author(s):  
Secondo Martinengo ◽  
Gianfranco Ciani ◽  
Angelo Sironi
Keyword(s):  
Structural Characterization ◽  
X Ray
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