HOME TheInfoList.com
Providing Lists of Related Topics to Help You Find Great Stuff
[::MainTopicLength::#1500] [::ListTopicLength::#1000] [::ListLength::#15] [::ListAdRepeat::#3]

Propynal
PROPYNAL is an organic compound with molecular formula C3H2O. It is the simplest possible chemical compound containing both alkyne and aldehyde functional groups . OCCURRENCE Propynal has been observed in the interstellar medium . It is hypothesized to be formed from a carbon monoxide -acetylene complex. Another possible pathway is through the reaction of propynylidyne (C3H) with water. SEE ALSO * Propenal
Propenal
REFERENCES * ^ Zhou, Li; Ralf I
[...More...]

"Propynal" on:
Wikipedia
Google
Yahoo

picture info

Aldehyde
An ALDEHYDE /ˈældᵻhaɪd/ or ALKANAL is an organic compound containing a functional group with the structure −CHO, consisting of a carbonyl center (a carbon double-bonded to oxygen) with the carbon atom also bonded to hydrogen and to an R group , which is any generic alkyl or side chain. The group—without R—is the ALDEHYDE GROUP, also known as the FORMYL GROUP. Aldehydes are common in organic chemistry . Many fragrances are aldehydes
[...More...]

"Aldehyde" on:
Wikipedia
Google
Yahoo

picture info

Alkyne
In organic chemistry , an ALKYNE is an unsaturated hydrocarbon containing at least one carbon—carbon triple bond . The simplest acyclic alkynes with only one triple bond and no other functional groups form a homologous series with the general chemical formula C nH 2n−2. Alkynes are traditionally known as acetylenes, although the name acetylene also refers specifically to C2H2, known formally as ethyne using IUPAC nomenclature . Like other hydrocarbons, alkynes are generally hydrophobic but tend to be more reactive
[...More...]

"Alkyne" on:
Wikipedia
Google
Yahoo

picture info

Oxygen
OXYGEN is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table , a highly reactive nonmetal , and an oxidizing agent that readily forms oxides with most elements as well as with other compounds . By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium . At standard temperature and pressure , two atoms of the element bind to form dioxygen , a colorless and odorless diatomic gas with the formula O 2. Diatomic oxygen gas constitutes 20.8% of the Earth\'s atmosphere . As compounds including oxides, the element makes up almost half of the Earth\'s crust
[...More...]

"Oxygen" on:
Wikipedia
Google
Yahoo

picture info

Functional Group
In organic chemistry , FUNCTIONAL GROUPS are specific groups (moieties ) of atoms or bonds within molecules that are responsible for the characteristic chemical reactions of those molecules. The same functional group will undergo the same or similar chemical reaction(s) regardless of the size of the molecule it is a part of. However, its relative reactivity can be modified by other functional groups nearby. The atoms of functional groups are linked to each other and to the rest of the molecule by covalent bonds . Functional groups can also be charged, e.g. in carboxylate salts (–COO−), which turns the molecule into a polyatomic ion or a complex ion . Functional groups binding to a central atom in a coordination complex are called ligands . Complexation and solvation is also caused by specific interactions of functional groups. In the common rule of thumb "like dissolves like", it is the shared or mutually well-interacting functional groups which give rise to solubility
[...More...]

"Functional Group" on:
Wikipedia
Google
Yahoo

picture info

Digital Object Identifier
In computing, a DIGITAL OBJECT IDENTIFIER or DOI is a persistent identifier or handle used to uniquely identify objects, standardized by the International Organization for Standardization
International Organization for Standardization
( ISO
ISO
). An implementation of the Handle System , DOIs are in wide use mainly to identify academic, professional, and government information, such as journal articles, research reports and data sets, and official publications though they also have been used to identify other types of information resources, such as commercial videos. A DOI aims to be "resolvable", usually to some form of access to the information object to which the DOI refers. This is achieved by binding the DOI to metadata about the object, such as a URL , indicating where the object can be found
[...More...]

"Digital Object Identifier" on:
Wikipedia
Google
Yahoo

CAS Registry Number
A CAS REGISTRY NUMBER, also referred to as CASRN or CAS NUMBER, is a unique numerical identifier assigned by the Chemical Abstracts Service (CAS) to every chemical substance described in the open scientific literature (currently including all substances described from 1957 through the present, plus some substances from the early or mid 1900s), including organic and inorganic compounds, minerals , isotopes , alloys and nonstructurable materials (UVCBs, of Unknown, Variable Composition, or Biological origin). The Registry maintained by CAS is an authoritative collection of disclosed chemical substance information. It currently identifies more than 129 million organic and inorganic substances and 67 million protein and DNA sequences, plus additional information about each substance. It is updated with around 15,000 additional new substances daily
[...More...]

"CAS Registry Number" on:
Wikipedia
Google
Yahoo

picture info

Argonium
ARGONIUM, an ion combining a proton and an argon atom (and so also called PROTONATED ARGON), (ARH+) can be made in an electric discharge , and was the first noble gas molecular ion to be found in interstellar space. CONTENTS * 1 Properties * 2 Reactions * 3 Spectrum * 4 Natural occurrence * 5 History * 6 Use * 7 Other things * 8 References PROPERTIES Argonium
Argonium
is isoelectronic with hydrogen chloride . Its dipole moment is 2.18 D for the ground state. The binding energy is 369 kJ mol−1 (2.9 eV ). This is smaller than that of H+ 3 and many other protonated species , but less than H+ 2. Lifetimes of different vibrational states vary with isotope and become shorter for the more rapid high-energy vibrations. For ArH+ v=1 2.28, v=2 1.2, v=3 0.85, v=4 0.64, v=5 0.46 ms For ArD+ 9.09, 4.71, 3.27, 2.55, 2.11 ms The force constant in the bond is calculated at 3.88 mdyne/Å2
[...More...]

"Argonium" on:
Wikipedia
Google
Yahoo

Carbon Monophosphide
CARBON MONOPHOSPHIDE (CP) is a chemical with a molecular weight of 42.984. CP is the pnictogenic cousin of the chalcogenic species CS . Aside from differences in the masses of the heavy atoms in each diatomic, CP and CN are both open-shell species with doublet Π ground electronic states while the ground states of CS and CO are closed-shell. The simple diatomic radical carbon monophosphide (CP) was detected in the circumstellar envelope of the star IRC +10216 in 1990. The identification was made by matching 10 rotational lines observed with the IRAM 30m radiotelescope . REFERENCES * ^ "Free CP in IRC + 10216". Astronomy and Astrophysics. 230: L9. 1990. Bibcode :1990A&A...230L...9G
[...More...]

"Carbon Monophosphide" on:
Wikipedia
Google
Yahoo

picture info

Nitrogen
NITROGEN is a chemical element with symbol N and atomic number 7. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772. Although Carl Wilhelm Scheele and Henry Cavendish had independently done so at about the same time, Rutherford is generally accorded the credit because his work was published first. The name nitrogen was suggested by Jean-Antoine-Claude Chaptal in 1790, when it was found that nitrogen was present in nitric acid and nitrates ; this name derives from the Greek roots νἰτρον "nitre " and -γεννᾶν "to form"
[...More...]

"Nitrogen" on:
Wikipedia
Google
Yahoo

Standard State
In chemistry , the STANDARD STATE of a material (pure substance , mixture or solution ) is a reference point used to calculate its properties under different conditions. In principle, the choice of standard state is arbitrary, although the International Union of Pure and Applied Chemistry
Chemistry
(IUPAC) recommends a conventional set of standard states for general use. IUPAC
IUPAC
recommends using a standard pressure po = 105 Pa . Strictly speaking, temperature is not part of the definition of a standard state. For example, as discussed below, the standard state of a gas is conventionally chosen to be unit pressure (usually in bar) ideal gas , regardless of the temperature. However, most tables of thermodynamic quantities are compiled at specific temperatures, most commonly 298.15 K (25.00 °C; 77.00 °F) or, somewhat less commonly, 273.15 K (0.00 °C; 32.00 °F)
[...More...]

"Standard State" on:
Wikipedia
Google
Yahoo

picture info

ECHA InfoCard
The EUROPEAN CHEMICALS AGENCY (ECHA; /ˈɛkə/ EK-ə ) is an agency of the European Union
European Union
which manages the technical, scientific and administrative aspects of the implementation of the European Union regulation called Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH). ECHA is the driving force among regulatory authorities in implementing the EU's chemicals legislation. ECHA helps companies to comply with the legislation, advances the safe use of chemicals, provides information on chemicals and addresses chemicals of concern. It is located in Helsinki
Helsinki
, Finland
Finland
. The Agency, currently headed by Executive Director Bjorn Hansen , started working on 1 June 2007
[...More...]

"ECHA InfoCard" on:
Wikipedia
Google
Yahoo

picture info

ChemSpider
CHEMSPIDER is a database of chemicals . ChemSpider
ChemSpider
is owned by the Royal Society of Chemistry . CONTENTS * 1 Database * 2 Crowdsourcing * 3 Searching * 4 Chemistry document mark-up * 5 History * 6 Services * 6.1 SyntheticPages * 6.2 Open PHACTS * 7 See also * 8 References DATABASEThe database contains information on more than 63 million molecules from over 280 data sources including: * EPA DSSTox * U.S
[...More...]

"ChemSpider" on:
Wikipedia
Google
Yahoo

picture info

JSmol
JMOL is computer software for molecular modelling chemical structures in 3-dimensions . Jmol
Jmol
returns a 3D representation of a molecule that may be used as a teaching tool, or for research e.g., in chemistry and biochemistry . It is written in the programming language Java , so it can run on the operating systems Windows , macOS , Linux
Linux
, and Unix , if Java is installed. It is free and open-source software released under a GNU Lesser General Public License (LGPL) version 2.0. A standalone application and a software development kit (SDK) exist that can be integrated into other Java applications, such as Bioclipse and Taverna . A popular feature is an applet that can be integrated into web pages to display molecules in a variety of ways. For example, molecules can be displayed as ball-and-stick models , space-filling models , ribbon diagrams , etc
[...More...]

"JSmol" on:
Wikipedia
Google
Yahoo

PubChem
PUBCHEM is a database of chemical molecules and their activities against biological assays. The system is maintained by the National Center for Biotechnology Information (NCBI), a component of the National Library of Medicine , which is part of the United States National Institutes of Health (NIH). PubChem can be accessed for free through a web user interface . Millions of compound structures and descriptive datasets can be freely downloaded via FTP . PubChem contains substance descriptions and small molecules with fewer than 1000 atoms and 1000 bonds. More than 80 database vendors contribute to the growing PubChem database. CONTENTS * 1 Databases * 2 Searching * 3 History * 4 ACS\'s concerns * 5 Database fields * 6 See also * 7 References * 8 External links DATABASES PubChem consists of three dynamically growing primary databases
[...More...]

"PubChem" on:
Wikipedia
Google
Yahoo

picture info

Simplified Molecular-input Line-entry System
The SIMPLIFIED MOLECULAR-INPUT LINE-ENTRY SYSTEM (SMILES) is a specification in form of a line notation for describing the structure of chemical species using short ASCII
ASCII
strings . SMILES strings can be imported by most molecule editors for conversion back into two-dimensional drawings or three-dimensional models of the molecules. The original SMILES specification was initiated in the 1980s. It has since been modified and extended. In 2007, an open standard called "OpenSMILES" was developed in the open-source chemistry community. Other 'linear' notations include the Wiswesser Line Notation (WLN), ROSDAL and SLN
[...More...]

"Simplified Molecular-input Line-entry System" on:
Wikipedia
Google
Yahoo
.