Crystal structure and characterization of a co-product in the syntheses of a Schiff base give evidence of its zwitterionic nature in the solid state

2022 ◽  
Author(s):  
María Rosa Rodríguez ◽  
Gustavo Espino ◽  
Oscar E. Piro ◽  
Gustavo A. Echeverría ◽  
Beatriz Susana Parajón Costa ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Solid State ◽  
X Ray

During the syntheses of the Schiff base 2-methoxy-6-{[(tiophen-2-methyl)imino]methylphenol (o-HVATPNH2), a co-´product was isolated and characterized. The crystal structure of this molecule, 4,10-dimethoxy-13-(thiophen-2-ylmethyl)-6,12-dihydro-6,12-epiminodibenzo[b,f][1,5]dioxocane, namely (o-VA)2TPNH2 for short, was determined by X-ray...

Multinuclear Paramagnetic NMR Spectra and Solid State X-ray Crystallographic Characterization of Manganese(III) Schiff-Base Complexes

1997 ◽  
Vol 36 (22) ◽  
pp. 4968-4982 ◽  
Author(s):  
Yangzhen Ciringh ◽  
Scott W. Gordon-Wylie ◽  
Richard E. Norman ◽  
George R. Clark ◽  
Susan T. Weintraub ◽  
...  
Keyword(s):  
Schiff Base ◽  
Solid State ◽  
Nmr Spectra ◽  
Schiff Base Complexes ◽  
Paramagnetic Nmr ◽  
X Ray

X-ray Crystal Structure of the N-(2-hydroxy-1-naphthalidene)phenylglycine Schiff Base. Synthesis and Characterization of its Transition Metal Complexes

2006 ◽  
Vol 31 (5) ◽  
pp. 580-585 ◽  
Author(s):  
Kalagouda B. Gudasi ◽  
Manjula S. Patil ◽  
Ramesh S. Vadavi ◽  
Rashmi V. Shenoy ◽  
Siddappa A. Patil ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Synthesis And Characterization ◽  
X Ray

Synthesis and structural characterization of Li3Y(BO3)2

2017 ◽  
Vol 72 (2) ◽  
pp. 153-158 ◽  
Author(s):  
Sebastian Bräuchle ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Solid State ◽  
Boric Acid ◽  
Structural Characterization ◽  
Diffraction Data ◽  
Lithium Carbonate ◽  
X Ray Diffraction ◽  
X Ray

AbstractLi3Y(BO3)2 was prepared by high-temperature solid state synthesis at 900°C in a platinum crucible from lithium carbonate, boric acid, and yttrium(III) oxide. The compound crystallizes monoclinically in the space group P21/c (no. 14) (Z=4) isotypically to Li3Gd(BO3)2. The structure was refined from single-crystal X-ray diffraction data: a=8.616(3), b=6.416(3), c=10.014(2) Å, β=116.6(2)°, V=494.9(3) Å3, R1=0.0211, and wR2=0.0378 for all data. The crystal structure of Li3Y(BO3)2 consists of [Y2O14] dinuclear units, which are interconnected to each other by planar B(1)O3 groups and LiO4 tetrahedra via common edges and corners along the a axis.

Synthesis and characterization of molybdenum–tin complexes derived from the molybdenum tricarbonyl anion, [MeGapz3]Mo(CO)3−, and organotin chlorides. X-ray crystal structure of [MeGapz3]Mo(CO)3SnPh3 (where pz = pyrazolyl, N2C3H3)

1986 ◽  
Vol 64 (2) ◽  
pp. 321-327 ◽  
Author(s):  
Emmanuel C. Onyiriuka ◽  
Steven J. Rettig ◽  
Alan Storr
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Heavy Atom ◽  
Synthesis And Characterization ◽  
Full Matrix ◽  
X Ray ◽  
Tin Complexes ◽  
Interesting Solution ◽  
Single Bonds

The reaction of the molybdenum tricarbonyl anion, [MeGapz3]Mo(CO)3−, with the organotin chlorides, Ph3SnCl, Me3SnCl, and Me2SnCl2, has yielded a series of complexes in which direct Mo—Sn single bonds are featured. The [MeGapz3]Mo(CO)3SnMe2Cl complex shows an interesting solution behavior in which a transition from a 3:4, or piano stool structure, to a 3:3:1, or capped octahedral arrangement, is thought to occur. The 3:3:1 structure has been demonstrated in the solid state for the [MeGapz3]Mo(CO)3SnPh3 compound by means of a crystal structure determination. Crystals of [methyltris(1-pyrazolyl)gallato-N,N,N](triphenylstannyl)tricarbonylmolybdenum are monoclinic, a = 11.4439(8), b = 19.5116(8), c = 15.2686(12) Å β = 111.370(3)°, Z = 4, space group P21/c. The structure was solved by conventional heavy-atom methods and was refined by full-matrix least-squares procedures to R = 0.025 and Rw = 0.031 for 5259 reflections with I ≥ 3σ(I). Important bond lengths include: Mo—Sn = 2.8579(3), Mo—N = 2.239(2)–2.244(2), Mo—C = 1.967(3)–2.000(3), Sn—C = 2.151(3)–2.166(3), Ga—N = 1.920(3)–1.931(3), and Ga—C = 1.943(4) Å.

Synthesis and characterization of ferrocene-containing new schiff base complexes. The X-ray crystal structure of (C10H6N2)CNNCHFc

Polyhedron ◽  
1992 ◽  
Vol 11 (15) ◽  
pp. 1917-1922 ◽  
Author(s):  
Xia Xu-Bing ◽  
Duan Chun-Ying ◽  
Zhu Long-Gen ◽  
You Xiao-Zeng ◽  
Yang Yao ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Schiff Base Complexes ◽  
Synthesis And Characterization ◽  
X Ray

Synthesis and Characterization of New Non-aromatic Texaphyrin-type Expanded Porphyrins

1999 ◽  
Vol 03 (02) ◽  
pp. 148-158 ◽  
Author(s):  
SYLVIE MEYER ◽  
MICHAEL C. HOEHNER ◽  
VINCENT LYNCH ◽  
JONATHAN L. SESSLER
Keyword(s):  
Schiff Base ◽  
Solid State ◽  
Good Yield ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Expanded Porphyrins ◽  
Meso Position ◽  
Macrocyclic Structure

The synthesis and X-ray diffraction-based characterization of a texaphyrin-type non-aromatic expanded porphyrin, 13,18,22,27-tetraethyl-14,17,23,26-tetramethyl-20-p-nitrophenyl-3,10,28,29,30,31-hexaazahexacyclo[23.2.1.04,9.112,15.116,19.121,24]untriaconta-2, 4, 5, 7, 10,12,14,16,18,-20,22,24(30),25,27-tetradecaene (1), is reported. This Schiff base macrocycle was prepared in good yield via the 1:1 HCl -catalyzed condensation of a tetrapyrrole dialdehyde precursor, (di(5-formyl-4,4'-diethyl-3,3'-dimethyl-2,2'-bipyrrole)-p-nitrophenylmethine), with 1,2-phenylenediamine. Compound 1 was assigned as being a 26 π-electron non-aromatic benzannulene on the basis of both proton NMR and single-crystal X-ray diffraction analyses. The latter studies, in particular, revealed a non-planar macrocyclic structure co-crystallized with a molecule of water. By varying either the diamine used in the cyclization step and/or the substituent in the meso-position of the tetrapyrrolic precursor, a range of other systems analogous to 1 could be obtained. The resulting systems were found to present good stability both in the solid state and in solution.

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