Dimetalated Crown Ether Schiff Base Palladacycles. Influence of the Carbon Chain Length on the Coordination Mode of Bidentate Phosphines. Crystal and Molecular Structure of the Novel Complex [Pd2{1,4-[C(H)═N{9,10-(C8H16O5)C6H3}]2C6H2-C2,C5}(Cl)2{μ-Ph2P(CH2)5PPh2}2]

2011 ◽  
Vol 30 (3) ◽  
pp. 386-395 ◽  
Author(s):  
Alberto Fernández ◽  
Margarita López-Torres ◽  
Samuel Castro-Juiz ◽  
Manuel Merino ◽  
Digna Vázquez-García ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Schiff Base ◽  
Crown Ether ◽  
Chain Length ◽  
Coordination Mode ◽  
Crystal And Molecular Structure ◽  
Carbon Chain ◽  
Carbon Chain Length ◽  
The Novel ◽  
Novel Complex

The Crystal and Molecular Structure of the Trinuclear Complex Bis[(μ-S)-α,α′-{(2-mercapto-5-methylbenzene-1,3-diyl)di(methylidyne)di(azino)}bis(cyclohexane-methanol)ato(3-)]tripalladium(II), L2Pd3. A New Coordination Mode for the Robson-Type Ligand L3-

1989 ◽  
Vol 42 (7) ◽  
pp. 1057 ◽  
Author(s):  
BF Hoskins ◽  
IAS Mcdonald
Keyword(s):  
Molecular Structure ◽  
Coordination Mode ◽  
Crystal And Molecular Structure ◽  
Trinuclear Complex ◽  
Binuclear Complexes ◽  
Central Metal ◽  
The Novel ◽  
X Ray Diffraction ◽  
Square Planar ◽  
Oxygen Groups

The crystal and molecular structure of the trinuclear complex L2Pd3 has been determined by single-crystal X-ray diffraction techniques at room temperatures, 20°C. The quinquedentate binucleating ligand, L3-, is formally the trianion α,α′-[(2-mercapto-5-methylbenzene-1,3-diyl )di(methylidyne)di(azino)]bis(cyclohexaemethano)ato(3-). Crystals of L2Pd3 are triclinic, PI, with a 11.896(1), b 13.4103(7), c 17.451(3) � , α 75.66(1), β 79.93(1) and γ88.99(1)�, Z 2. The structure was solved by the normal Fourier methods and refined by a least-squares procedure which gave final R and R, values of 0.046 and 0.049 respectively for the 7769 statistically significant reflections. The approximately square-planar coordination environments of the palladium centres give rise to a boat-shaped arrangement in which an approximate, non-crystallographic, twofold axis normal to the plane of the central metal is evident. The notable feature of the structure lies in the novel coordination mode adopted by the binucleating ligand. With respect to the binuclear complexes of this ligand, an electronic reorganization has occurred in one of the sidearms of both ligands which enables the formation of the pair of hydrazine bridges and also causes two of the terminal oxygen groups to become non-coordinating.

A comparative study on alcohol-diesel blended fuels in a common rail diesel engine: Combined effects of carbon numbers, oxygen content, and molecular structure

2021 ◽  
pp. 095765092110240
Author(s):  
Zilong Li ◽  
Shijie Mi ◽  
Yaoyuan Zhang ◽  
Jizhen Zhu ◽  
Yong Qian ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Particle Size ◽  
Diesel Engine ◽  
Chain Length ◽  
Oxygen Content ◽  
Carbon Chain ◽  
Common Rail ◽  
Carbon Chain Length ◽  
Emission Characteristics ◽  
Blended Fuels

Abundant alcohols, including ethanol, propanol, butanol, and pentanol, are expected to be used in compression ignition engines to ease the shortages of fossil fuel. The various alcohols have quite a different combustion and emission characteristics in the engine due to the changes in molecular structures. In this paper, a series of experiments were conducted on a modified common-rail diesel engine fueled with diesel/alcohols blended fuels in a wide operating range. The effects of alcohol chain length, oxygen content, and molecular structure on engine combustion and emission characteristics are studied systematically. The experimental results show that the blending of alcohols increases the peak values of in-cylinder pressure and maximum pressure rising rate. Besides, the combustion duration and ignition delay are mainly affected by oxygen content and isomer structure. The addition of short-chain alcohols will significantly reduce the total mass of particulate matter (PM) emissions, while the CO and HC emissions increase appropriately. The CO, HC, aldehydes, and ethylene emissions are mainly affected by carbon chain length and isomer structure. For PM emissions, the carbon chain length, molecular structure, and oxygen content of alcohol fuels have different influences on PM number, PM mass, and particle size distributions. The shorter carbon chain of alcohol leads to smaller particle size, and higher oxygen content leads to lower total particle mass.

Ionic liquid-biosurfactant blends as effective dispersants for oil spills: Effect of carbon chain length and degree of saturation

2021 ◽  
pp. 117119
Author(s):  
Mansoor Ul Hassan Shah ◽  
Ambavaram Vijaya Bhaskar Reddy ◽  
Suzana Yusup ◽  
Masahiro Goto ◽  
Muhammad Moniruzzaman
Keyword(s):  
Ionic Liquid ◽  
Chain Length ◽  
Oil Spills ◽  
Carbon Chain ◽  
Degree Of Saturation ◽  
Carbon Chain Length

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.

Controlling the Secondary Assembly of Porous Anionic Uranyl-organic Polyhedra through Organic Cationic Templates

2021 ◽  
Author(s):  
Liwen Zeng ◽  
Kong-qiu Hu ◽  
Zhi-wei Huang ◽  
Lei Mei ◽  
Xianghe Kong ◽  
...  
Keyword(s):  
Chain Length ◽  
Carbon Chain ◽  
Carbon Chain Length ◽  
Organic Templates ◽  
Secondary Assembly

Herein, we report a new uranyl-organic polyhedron U4L4 (L=BTPCA) assembled from uranyl and a semirigid tritopic ligand. By adjusting the carbon chain length of the organic templates, two complexes can...

Effect of carbon chain length on biological activity of novel palladium (II) complexes

2014 ◽  
Vol 82 ◽  
pp. 172-180 ◽  
Author(s):  
En-Jun Gao ◽  
Hong Fu ◽  
Ming-Chang Zhu ◽  
Chi Ma ◽  
Shi-Kai Liang ◽  
...  
Keyword(s):  
Biological Activity ◽  
Chain Length ◽  
Carbon Chain ◽  
Carbon Chain Length
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