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In chemistry a donor number (DN) is a quantitative measure of Lewis basicity.A donor number is defined as the negative enthalpy value for the 1:1 adduct formation between a Lewis base and the standard Lewis acid SbCl 5 (antimony pentachloride), in dilute solution in the noncoordinating solvent 1,2-dichloroethane with a zero DN.
This is a list of scientific journals in chemistry and its various subfields. For journals mainly about materials science, see List of materials science journals. A
BZ [3] Congener Number Formula Name CAS Number InChIKey Descriptors 0 C 12 H 10: Biphenyl 92-52-4 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 1 C 12 H 9 Cl: 2-Chlorobiphenyl 2051-60-7 LAXBNTIAOJWAOP-UHFFFAOYSA-N CP1 2 C 12 H 9 Cl: 3-Chlorobiphenyl 2051-61-8 NMWSKOLWZZWHPL-UHFFFAOYSA-N CP0 3 C 12 H 9 Cl: 4-Chlorobiphenyl 2051-62-9 FPWNLURCHDRMHC-UHFFFAOYSA-N ...
List of accounting journals; List of African studies journals; List of anarchist periodicals; List of anthropology journals; List of arachnology journals; List of astronomy journals; List of bioethics journals; List of bioinformatics journals; List of biology journals; List of botany journals; List of chemistry journals; List of computer ...
the number of times the articles in the journal were cited during the year by later articles in itself and other journals, detailed tables showing the number of citations made from articles published in the journal that year to it and other specific individual journals during each of the most recent ten years (the 20 journals most cited are ...
The Damköhler numbers (Da) are dimensionless numbers used in chemical engineering to relate the chemical reaction timescale (reaction rate) to the transport phenomena rate occurring in a system. It is named after German chemist Gerhard Damköhler , who worked in chemical engineering, thermodynamics, and fluid dynamics. [ 1 ]
Once this is determined, all one needs to do is take the total value of Δ f H, subtract the Δ f H caused by the C−(C) 2 (H) 2 group(s), and then divide that number by two (due to two C−(C)(H) 3 groups), obtaining the value of the C−(C)(H) 3 group. From the knowledge of these two groups, Benson moved forward obtain and list functional ...
For hydrocarbons, the DBE (or IHD) tells us the number of rings and/or extra bonds in a non-saturated structure, which equals the number of hydrogen pairs that are required to make the structure saturated, simply because joining two elements to form a ring or adding one extra bond (e.g., a single bond changed to a double bond) in a structure reduces the need for two H's.