A flexible framework obtained from oxidative additions upon the binuclear complex [Ir2(µ-pz)(µ-SBut)(CO)2{P(OMe)3}2]: preparation and X-ray structures of [Ir2(µ-pz)(µ-SBut)(µ-L)(CO)2{P(OMe)3}2] and [Ir2(µ-pz)(µ-SBut)(µ-L)I2(CO)2-{P(OMe)3}2](Hpz = pyrazole, L = dimethyl acetylenedicarboxylate)

1990 ◽  
pp. 989-994 ◽  
Author(s):  
M. Teresa Pinillos ◽  
Anabel Elduque ◽  
Luis A. Oro ◽  
Fernando J. Lahoz ◽  
Flavio Bonati ◽  
...  
Keyword(s):  
Binuclear Complex ◽  
Dimethyl Acetylenedicarboxylate ◽  
X Ray ◽  
Oxidative Additions ◽  
Flexible Framework

Synthesis of an Unprecedented H-stitched Binuclear Crystal Structure Based on Selective Fluorescence Recognition of Zn2+ in Newly Synthesized Schiff Base Ligand with DFT and Imaging Application in Living Cells

2021 ◽  
Author(s):  
SOUMYA SUNDAR MATI ◽  
Dr. SAUGATA KONAR ◽  
BOBY SAMAI
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Elemental Analysis ◽  
Schiff Base Ligand ◽  
Binuclear Complex ◽  
Living Cells ◽  
X Ray Diffraction ◽  
Schiff Base Ligands ◽  
X Ray ◽  
Imaging Application

A zinc coordinated rare binuclear complex was synthesised and characterized by elemental analysis and single-crystal X-ray diffraction. Two mononuclear units formed by two Schiff base ligands 2-((2-(pyrimidin-2-yl)hydrazono)methyl)phenol (PHP) coordinated with...

Novel binuclear doubly vinyl-bridged iridium complexes formed by olefinic C—H activation

1995 ◽  
Vol 73 (7) ◽  
pp. 1050-1057 ◽  
Author(s):  
Helmut Werner ◽  
Justin Wolf ◽  
Angelika Nessel ◽  
Arno Fries ◽  
Bernd Stempfle ◽  
...  
Keyword(s):  
Structure Analysis ◽  
Binuclear Complex ◽  
Iridium Complexes ◽  
Heterometallic Complex ◽  
Metal Compounds ◽  
X Ray ◽  
Compound C

Treatment of [C5H5IrX2]n (2: X = Cl; 3: X = Br) with CH2=CHtBu in the presence of Na2CO3–iPrOH gives, besides the bis(olefin) complex [C5H5Ir(CH2=CHtBu)2] (4), the doubly vinyl-bridged iridium(II) compound {[C5H5Ir(μ-η1,η2-CH=CHtBu)]2} (5). The related binuclear complex {[CH2(C5H4)2][Ir2(μ-η1,η2-CH=CHtBu)2]} (9) was obtained from {[CH2(C5H4)2][IrBr2]2}n (8) and CH2=CHtBu–Na2CO3 in ethanol and characterized by an X-ray structure analysis (monoclinic, C2/c (No. 15), a = 20.050(8), b = 8.843(1), c = 24.25(1) Å, β = 99.53(2)°, V = 4241 Å3, Z = 8, R = 0.032, Rw = 0.041). Protonation of both 5 and 9 with HBF4•OEt2 yields the BF4 salts of the unsymmetrical hydridometal cations 10 and 11 in which the vinyl bridges are still intact. The reaction of the binuclear bis(cyclooctene)metal compounds {[CH2(C5H4)2][Rh(C8H14)2]2} (14) and {[CH2(C5H4)2][Rh(C8H14)2][Ir(C8H14)2]} (17) with bromine yields almost quantitatively the polymeric (or oligomeric) dibromo derivatives 16 and 18, which could, however, not be converted to vinyl bridged complexes by treatment with CH2=CHtBu–Na2CO3–ROH. Keywords: iridium complexes, C-H activation, bridging vinyl ligands, cationic hydridometal complexes, heterometallic complex.

X-RAY ANALYSIS OF PYRROLIZIDINES SYNTHESIZED BY DIASTEREOSELECTIVE α-CYCLISATION OF CAPTODATIVE OR PUSH-PULL ENAMINES WITH DIMETHYL ACETYLENEDICARBOXYLATE

2010 ◽  
Vol 104 (6) ◽  
pp. 397-400 ◽  
Author(s):  
B. Tinant ◽  
J. Feneau-Dupont ◽  
J. P. Declercq ◽  
B. De Boeck ◽  
S. Jiang ◽  
...  
Keyword(s):  
Dimethyl Acetylenedicarboxylate ◽  
X Ray

Heterocyclisation of substituted ylidenethiocarbonohydrazides using dimethyl acetylenedicarboxylate

2015 ◽  
Vol 69 (7) ◽  
Author(s):  
Alaa A. Hassan ◽  
Fathy F. Abdel-Latif ◽  
Mohamed Abdel Aziz ◽  
Sara M. Mostafa ◽  
Stefan Bräse ◽  
...  
Keyword(s):  
Single Crystal ◽  
Condensation Reaction ◽  
Dimethyl Acetylenedicarboxylate ◽  
Rapid Procedure ◽  
X Ray

AbstractA facile and rapid procedure for the synthesis of dimethyl-2-[3-amino-5-(2-methoxy-2-oxoethylidene)- 4-oxothiazolidin-2-ylidenehydrazono]succinate, dimethyl {[2-alkylidenehydrazono)-5-(2-methoxy- 2-oxoethylidene)-4-oxothiazolidin-3-yl)amino]succinate and methyl (4-amino-5-oxo-3- thioxo-2,3,4,5-tetrahydro-1,2,4-triazine-6-yl)acetate affording yields of 61-54 %, 22-18 % and 14- 11 %, respectively, via a condensation reaction of dimethyl acetylenedicarboxylate (DMAD) with (substituted ylidene)thiocarbonohydrazides. One of the products was conclusively confirmed by single-crystal X-ray analysis. A mechanism for the formation of the products is presented.

Synthesis and crystal structures of three novel benzimidazole/benzoindolizine hybrids

2016 ◽  
Vol 71 (3) ◽  
pp. 231-239 ◽  
Author(s):  
Roumaissa Belguedj ◽  
Sofiane Bouacida ◽  
Hocine Merazig ◽  
Ali Belfaitah ◽  
Aissa Chibani ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Crystal Structures ◽  
Dipolar Cycloaddition ◽  
Dimethyl Acetylenedicarboxylate ◽  
X Ray ◽  
X Ray Crystallography ◽  
Dimethyl Maleate

AbstractThree benzoindolizine derivatives, 1, 2, and 3, were obtained via 1,3-dipolar cycloaddition. The reaction of 1-(2′-benzimidazolylmethyl)isoquinolinium ylides with dimethyl acetylenedicarboxylate gave a mixture of pyrrolo[2,1-a]isoquinoline-1,2-dicarboxylate (1) and 1,10b-dihydropyrrolo[2,1-a]isoquinoline-1,2-dicarboxylate (2) derivatives containing a benzimidazole moiety. The reaction of this isoquinolinium N-ylide with dimethyl maleate gave an unexpected 2,3-dihydropyrrolo[2,1-a]isoquinoline-1,2-dicarboxylate (3). The structures of all reported compounds have been examined by X-ray crystallography, mass spectrometry, and NMR spectroscopy.

Übergangsmetall-Carbin-Komplexe, LXXII [1]. Reaktionen von trans-Bromotetracarbonyl(phenylcarbin)chrom mit Lithiumthiokresolat und Lithiumselenophenolat / Transition Metal Carbyne Complexes, LXXII [1]. Reactions of trans-Bromotetracarbonyl(phenylcarbyne)chromium with Lithium Thiocresolate and Lithium Phenylselenolate

1982 ◽  
Vol 37 (10) ◽  
pp. 1274-1278 ◽  
Author(s):  
Werner Roll ◽  
Ernst Otto Fischer ◽  
Dietmar Neugebauer ◽  
Ulrich Schubert
Keyword(s):  
Hydrochloric Acid ◽  
Transition Metal ◽  
Structure Determination ◽  
Binuclear Complex ◽  
Spectroscopic Data ◽  
Reaction Conditions ◽  
X Ray ◽  
Carbyne Complexes ◽  
Ether Complex

The reaction of trans-bromotetracarbonyl(phenylcarbyne)chromium (1) with lithium phenylselenolate and subsequent protonation with aqueous hydrochloric acid leads to (CO)5Cr[Se2(C6H5)2] (3) and (CO)4Cr(μ-SeC6H5)2Cr(CO)4 (4). From 1 and lithium 4-methylphenylthiolate (CO)5CrC(C6H5)SC6H4CH3 (5) and (CO)5CrS(C2H5)(4-CH3C6H4) (6) are obtained, if triethyloxonium tetrafluoroborate is used instead of hydrochloric acid. The analoguous reaction of 1 with lithium phenylselenolate yields the seleno ether complex (7). Reaction conditions, properties, spectroscopic data and the results of an X-ray structure determination of the binuclear complex (4) are reported.

ChemInform Abstract: X-Ray Analysis of Pyrrolizidines Synthesized by Diastereoselective . alpha.-Cyclization of Captodative or Push-Pull Enamines with Dimethyl Acetylenedicarboxylate.

ChemInform ◽  
2010 ◽  
Vol 26 (37) ◽  
pp. no-no
Author(s):  
B. TINANT ◽  
J. FENEAU-DUPONT ◽  
J. P. DECLERCQ ◽  
B. DE BOECK ◽  
S. JIANG ◽  
...  
Keyword(s):  
Dimethyl Acetylenedicarboxylate ◽  
X Ray
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