Results 31 to 40 of about 1,695,530 (119)

The structure of triphenylgermanium hydroxide [PDF]

open access: yes, 1992
C18H~6GeO, Mr = 320.9, triclinic, Pi, a = 15.408 (6), b = 19.974 (7), c = 23.264 (11) A, a = 107.78 (4), 13 = 1.03.54 (4), y= 101.51 (3) °, V = 6338 (5)/~3, Z = 16, Dx = 1.34 g cm -3, a(Mo Ka) = 0.71073A, /z = 19.1cm-1, F(000)=2624, T= 293 K, R = 0 ...
Gallagher, John F.   +5 more
core   +2 more sources

Electronic Smoking Devices Among University Students: Usage Patterns and Chemical Composition of Inhaled Substances

open access: yesAnalytical Science Advances, Volume 7, Issue 1, June 2026.
ABSTRACT This study investigated the prevalence of electronic smoking device (ESD) use and its associated behavioural and chemical risks among university students in Bahia, Brazil. A cross‐sectional survey was conducted with 355 students from public and private institutions through an online questionnaire between April and May 2023. Among participants,
Eduard F. Valenzuela   +7 more
wiley   +1 more source

Structural‐to‐Functional Complexity Transformations Enabled by Bridged Polyheterocycles: Access to Cis‐1,3‐Diamines and Amino‐Alcohols

open access: yesChemistryEurope, Volume 4, Issue 6, June 2026.
Polycyclic intermediates enable stereocontrolled synthesis of densely functionalized cis‐1,3‐diamine and amino alcohol carbocycles and heterocycles via structural‐to‐functional complexity transformations from low‐complexity starting material. Cis‐1,3‐functionalized carbocycles and saturated heterocycles are ubiquitous motifs in natural products ...
Jiayi Zhu   +2 more
wiley   +1 more source

Divergent Synthesis of Polycyclic Derivatives via Gold Catalysis

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 20, 27 May 2026.
Gold(I)‐catalyzed cycloisomerization enables the formation of complex 3D structures from simple enyne precursors. This study presents a divergent strategy to synthesize functionalized bicyclic and tricyclic scaffolds from a common alkynyl ketone.
Emilie Gentilini   +4 more
wiley   +1 more source

GC × GC‐TOF MS and Sensory Profiling of Aroma Compounds in Magnolia Species: Effects of Processing Methods on Volatile Retention in M. wufengensis

open access: yesFlavour and Fragrance Journal, Volume 41, Issue 3, Page 487-503, May 2026.
The first comparative analysis of Magnolia scents reveals that M. wufengensis is characterised by a high aldehyde content, exhibiting a fresh, sweet, and fruity fragrance profile. Furthermore, freeze‐drying preserves 6.7 times more 2‐nonenal compared to shade‐drying, highlighting its superior efficacy in retaining key volatile compounds.
Xiaole Wang   +7 more
wiley   +1 more source

Addressing Stereochemistry of Heterocyclic Compounds by DFT NMR Calculations

open access: yes, 2018
[Figure not available: see fulltext.] This minireview aims to concisely present the state of the art from 2013 to 2017 in the joint application of a computational and experimental NMR approach to the stereostructural analysis of heterocyclic compounds ...
Luisa Pisano   +5 more
core   +1 more source

Enantioselective Synthesis of Bridged Bicyclic Ring Systems

open access: yes, 2016
The type 2 intramolecular Diels−Alder (IMDA) reaction is a valuable method for synthesis of both carbocyclic and heterocyclic bridged bicyclo[5.3.1]undecane and bicyclo[4.3.1]decane ring systems.
Liang Zhu (172992)   +3 more
core   +1 more source

An investigation of naphthalenediimides as central building blocks in model compounds for scanning tunneling microscope induced light emission experiments and förster resonance energy transfer studies [PDF]

open access: yes, 2010
Scanning tunnelling microscopy (STM) is a powerful technique to observe surfaces at the atomic level. The resolution of this STM technique is good enough to study the electronic properties of single molecules adsorbed onto metallic substrates.
Gabutti, Sandro
core   +1 more source

Organocatalytic Asymmetric Synthesis of Spiro-Bridged and Spiro-Fused Heterocyclic Compounds Containing Chromane, Indole, and Oxindole Moieties

open access: yes, 2018
Following the reactivity inversion strategy, two different two-step sequences were designed and successfully applied to the asymmetric synthesis of spiro-bridged and spiro-fused heterocyclic compounds, which combined chromane, indole, and oxindole, three
Zhi-Hao You (5891666)   +7 more
core   +1 more source

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