Controlling viscosity in methyl oleate derivatives through functional group design

2014 ◽  
Vol 38 (12) ◽  
pp. 5777-5785 ◽  
Author(s):  
Zoë Hungerford ◽  
Kaitlin D. Beare ◽  
Alexander K. L. Yuen ◽  
Anthony F. Masters ◽  
Thomas Maschmeyer
Keyword(s):  
Molecular Structure ◽  
Methyl Oleate ◽  
Functional Group ◽  
Group Design ◽  
Lubrication Properties

The effect of molecular structure on commercially relevant lubrication properties is elucidated in a set of 16 renewable oleate derivatives.

The effects of molecular structure and functional group of a rodlike Schiff base mesogen on blue phase stabilization in a chiral system

2019 ◽  
Vol 43 (4) ◽  
pp. 1743-1756
Author(s):  
Chiung-Cheng Huang ◽  
Yu-Chang Huang ◽  
Wei-Cheng Hsieh ◽  
Yen-Jung Chen ◽  
Shi-Kai Jiang ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Schiff Base ◽  
Functional Group ◽  
Phase Stabilization ◽  
System P ◽  
Blue Phase ◽  
Chiral Dopants ◽  
Chiral System

A wider blue phase (BP) range can be induced easily when two difluoro substituted and racemic rodlike Schiff base mesogens are doped with the appropriate concentration of chiral dopants S811 or ISO(6OBA)2.

Study on Lubrication Properties of Carboxymethyl Cellulose as a Novel Additive in Water-Based Stock

2005 ◽  
Author(s):  
Wenchao Guan ◽  
Gang Ke ◽  
Changyu Tang ◽  
Yifeng Liu
Keyword(s):  
Molecular Structure ◽  
Renewable Resources ◽  
Carboxymethyl Cellulose ◽  
Base Stock ◽  
Cellulose Derivatives ◽  
Frictional Pair ◽  
Water Based ◽  
Lubrication Properties ◽  
Scanning Electron ◽  
Antiwear Ability

This paper reports cellulose derivative—carboxymethyl cellulose (CMC) as a novel additive in a water-based stock (water content above 95 wt.%). Cellulose is one of the richest renewable resources on earth and has many peculiar qualities. Several cellulose derivatives such as CMC can easily dissolve in water and form stable thin film on the surface of metal. Several apparatus involving four-ball machine were used to investigate lubrication properties of the based stock containing CMC. The worn surfaces were observed with a scanning electron microscope. As the results, the anti-wear ability of the base stock is effectively increased by addition of a small amount (0.7 wt.%) of CMC. The additive with peculiar molecular structure contributes to abate the adhesion and scuffing of frictional pair effectively, hence improves the antiwear ability of the base stock. Thus CMC provides a potential application in the field of water-based stock lubrication.

rac-1-[(2-Methoxyethyl)sulfanyl]-2-[(2-methoxyethyl)sulfinyl]benzene and its PdCl2complex

2012 ◽  
Vol 68 (9) ◽  
pp. m238-m241 ◽  
Author(s):  
J. Traeger ◽  
A. Kelling ◽  
U. Schilde ◽  
H.-J. Holdt
Keyword(s):  
Molecular Structure ◽  
Single Crystals ◽  
Functional Group ◽  
Mesomeric Effect ◽  
Reference Compound ◽  
Complex Ii ◽  
Bond Lengths ◽  
Square Planar

As an extension of recent findings on the recovery of palladium with dithioether extractants, single crystals of the chelating vicinal thioether sulfoxide ligandrac-1-[(2-methoxyethyl)sulfanyl]-2-[(2-methoxyethyl)sulfinyl]benzene, C12H18O3S2, (I), and its square-planar dichloridopalladium complex,rac-dichlorido{1-[(2-methoxyethyl)sulfanyl]-2-[(2-methoxyethyl)sulfinyl]benzene-κ2S,S′}palladium(II), [PdCl2(C12H18O3S2)], (II), have been synthesized and their structures analysed. The molecular structure of (II) is the first ever characterized involving a dihalogenide–PdIIcomplex in which the palladium is bonded to both a thioether and a sulfoxide functional group. The structural and stereochemical characteristics of the ligand are compared with those of the analogous dithioether compound [Traegeret al.(2012).Eur. J. Inorg. Chem.pp. 2341–2352]. The sulfinyl O atom suppresses the electron-pushing and mesomeric effect of the S—C...;C—S unit in ligand (I), resulting in bond lengths significantly different than in the dithioether reference compound. In contrast, in complex (II), those bond lengths are nearly the same as in the analogous dithioether complex. As observed previously, there is an interaction between the central PdIIatom and the O atom that is situated above the plane.

scholarly journals N 6-Trimethyl-lysine metabolism. Structural identification of the metabolite 3-hydroxy-N6-trimethyl-lysine

1980 ◽  
Vol 188 (2) ◽  
pp. 521-527 ◽  
Author(s):  
Raymond F. Novak ◽  
Terrence J. Swift ◽  
Charles L. Hoppel
Keyword(s):  
Molecular Structure ◽  
Chemical Shift ◽  
Functional Group ◽  
Group Analysis ◽  
Resonance Spectroscopy ◽  
13C Nuclear Magnetic Resonance ◽  
Chemical Shift Data ◽  
Functional Group Analysis ◽  
13C Chemical Shift ◽  
Shift Data

1H and 13C nuclear-magnetic-resonance spectroscopy and functional-group analysis were used to determine the molecular structure of an isolated metabolite (IIb) of trimethyl-lysine as 3-hydroxy-N6-trimethyl-lysine, an important intermediate in the conversion of trimethyl-lysine into trimethylammoniobutyrate and carnitine [Hoppel, Cox & Novak (1980) Biochem. J.188, 509–519]. Functional-group analysis revealed the presence of a primary amine and reaction of metabolite (IIb) with periodate yielded 4-N-trimethylammoniobutyrate as a product, showing 2,3-substitution on the molecule and suggesting that the 3-substitution on the molecule may be an alcohol ([unk]CH–OH), amine ([unk]CH[unk]–NH2) or carbonyl ([unk]C=O) functional group. 1H integration ratios, 1H and 13C chemical-shift data and 1H and 13C signal multiplicities from the sample (IIb) were used to complete the identification of metabolite (IIb) as 3-hydroxy-N6-trimethyl-lysine. For example, the proton multiplet at δ 4.2p.p.m. and doublet at δ 4.1p.p.m., positions representative of amine or alcohol substitution on methylene carbon atoms, integration ratios of 1:1:2:9:4 and a positive ninhydrin test suggest 3-hydroxy-N6-trimethyl-lysine as the molecular structure for metabolite (IIb). 13C chemical-shift data obtained from the sample (IIb) and compared with several model compounds (trimethylammoniohexanoate, trimethyl-lysine and 3-hydroxylysine) resulted in generation of the spectrum of the metabolite and allowed independent identification of metabolite (IIb) as 3-hydroxy-N6-trimethyl-lysine. The 1H spectrum of erythro- and threo-3-hydroxylysine are presented for comparison, and the 1H and 13C n.m.r. spectra of the erythro-isomer support this analysis.

scholarly journals Synthesis, molecular structure, spectroscopic and computational studies on 4-(2-(2-(2-formylphenoxy)ethoxy)ethoxy)phthalonitrile as Functionalized Phthalonitrile

2019 ◽  
Vol 38 (1) ◽  
pp. 63 ◽  
Author(s):  
Pinar Sen ◽  
Salih Zeki Yıldız ◽  
Vildan Enisoglu Atalay ◽  
Sibel Demir Kanmazalp ◽  
Necmi Dege
Keyword(s):  
Molecular Structure ◽  
Functional Group ◽  
Spectroscopic Properties ◽  
Comparative Approach ◽  
Computational Studies ◽  
Crystal Data ◽  
X Ray ◽  
Elemental Analyses ◽  
Ft Ir

This work presents the synthesis and characterization of a novel compound, 4-(2-(2-(2-formylphenoxy)ethoxy)ethoxy)phthalonitrile as the aldehyde functional group substituted phthalonitrile derivative. The spectroscopic properties of the compound were examined by FT-IR, 1H-NMR, 13C-NMR, UV-vis, MS, elemental analyses. The molecular structure of the compound was also confirmed using X-ray single-crystal data with a theorical comparative approach.

Koordinationschemie perhalogenierter Cyclopentadiene und Alkine, XI [1].Darstellung einiger Cymantrenyl-mono- und bis-thioether mit einer weiteren funktionellen Gruppe am Cyclopentadienylring. Molekülstruktur von [C5Cl2(SMe)2(PPh2)]Mn(CO)3 / Coordination Chemistry of Perhalogenated Cyclopentadienes and Alkynes, XI [1]Synthesis of Some Cymantrene Mono- and Bis-Thioethers with One Additional Functional Group on the Cyclopentadienyl Ring. Molecular Structure of [C5Cl2(SMe)2(PPh2)]Mn(CO)3

1993 ◽  
Vol 48 (5) ◽  
pp. 583-590 ◽  
Author(s):  
Karlheinz Sünkel ◽  
Adrian Blum ◽  
Barbara Wagner
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Coordination Chemistry ◽  
Carboxylic Acid ◽  
Acid Chloride ◽  
Functional Group ◽  
Urea Derivative ◽  
Cyclopentadienyl Complexes ◽  
Work Up

Chiral Cyclopentadienyl Complexes, Crystal StructureThe reaction of [C5Cl4(SMe)]Mn(CO)3 (la) with n-butyllithium and the electrophiles SiMe3Cl, CO2, or PPh2Cl regiospecifically yields the chiral 1,3-disubstituted functional cymantrene thioethers [C5Cl3(SMe)R]Mn(CO)3 (R = SiMe3 (2), COOLi (3a), PPh2 (4)). 3 a can be protonated to give the corresponding carboxylic acid (3b), which in turn can be transformed to the acid chloride [C5Cl3(SMe)(COCl)]Mn(CO)3 (3c). 3c reacts with NaN3 to yield after work-up the urea derivative OC[[NH—C5Cl3(SMe)]Mn(CO)3]2 (3d). Using the cymantrene bisthioethers [C5Cl3(SR)2]Mn(CO)3 (R = Me, 5a, Ph, 5b) as starting materials, the carboxyl derivatives [C5Cl2(SMe)2(COR)]Mn(CO)3 (R = OLi, 6a, OH, 6b, Cl, 6c) and the potential organometallic S,P-chelate ligands [C5Cl2(SR)2(PPh2)]Mn(CO)3 (R = Me, 7a, Ph, 7b) can be obtained. The crystal structure determination of 7a (C22H16O3PS2Cl2Mn, monoclinic, P 21/c, a = 18.714(6) A, b = 9.506(3) A, c = 14.475(3) Α, β = 109.18(2)°, V = 2432.1(12) Α3, Z = 4) shows an orientation of the neighbouring PPh2- and SMe groups, that allows chelation of an additional metal fragment.

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