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O que (quem) é N-heterocyclic silylene - definição
N-heterocyclic silylene
![[tBuN\sCH\dCH\stBuN]Si}}](https://commons.wikimedia.org/wiki/Special:FilePath/Margin general synth no English.svg?width=200 "[tBuN\sCH\dCH\stBuN]Si}}")
![Contour map based on Atoms in Molecules analysis of the archetypal unsaturated NHSi [HN-CH=CH-NH]Si: showing second derivative of charge density. Solid line indicate a positive Laplacian and striped indicate a negative Laplacian.](https://commons.wikimedia.org/wiki/Special:FilePath/NHSi contour map.png?width=200 "Contour map based on Atoms in Molecules analysis of the archetypal unsaturated NHSi [HN-CH=CH-NH]Si: showing second derivative of charge density. Solid line indicate a positive Laplacian and striped indicate a negative Laplacian.")
CLASS OF CHEMICAL COMPOUNDS
User:Nblewis/sandbox; N-Heterocyclic Silylene; Diamino silylene
An N-Heterocyclic silylene (NHSi) is an uncharged heterocyclic chemical compound consisting of a divalent silicon atom bonded to two nitrogen atoms. The isolation of the first stable NHSi, also the first stable dicoordinate silicon compound, was reported in 1994 by Michael Denk and Robert West three years after Anthony Arduengo first isolated an N-heterocyclic carbene, the lighter congener of NHSis.
Coinage metal N-heterocyclic carbene complexes
MCl Contours.png?width=200 "Contour line diagrams of the Laplacian distribution of three (NHC)MCl complexes. Solid contours show charge accumulation; dashed contours show charge depletion; blue lines show bond paths; blue dots show bond critical points. (See Boehme and Frenking 1998 for a thorough discussion).<ref name=\":6\" />")
 Possible Geometries.jpg?width=200 "Examples of reported coinage metal NHC complexes displaying various structural types.<ref name=\":0\" /><ref name=\":3\" />")
 Synthetic Schemes.png?width=200 "Schematic examples of coinage metal NHC complexes synthesized through the four typical methods highlighted in the text.<ref name=\":1\" />")
CLASS OF CHEMICAL COMPOUNDS
User:Vmannava/Coinage Metal N-Heterocyclic Carbene (NHC) Complexes; Coinage Metal N-Heterocyclic Carbene (NHC) Complexes
Coinage metal N-heterocyclic carbene (NHC) complexes refer to transition metal complexes incorporating at least one coinage metal center (M = Cu, Ag, Au) ligated by at least one NHC-type persistent carbene. A variety of such complexes have been synthesized through deprotonation of the appropriate imidazolium precursor and metalation by the appropriate metal source, producing MI, MII, or MIII NHC complexes.
heterocyclic
.svg?width=200 "Structure of Oxane")
CYCLIC CHEMICAL COMPOUND HAVING AS RING MEMBERS ATOMS OF AT LEAST TWO DIFFERENT ELEMENTS
Heterocyclic; Heterocyclic ring; Heterocycle; Heterocyclic compounds; Heterocyclic chemistry; Heterocyclic compounds, 1-ring; Heterocyclic compounds, 2-ring; Heterocyclic compounds, 3-ring; Heterocyclic compounds with 4 or more rings; Borirene; Heterocyclic Chemistry; Heterocyclics; Heteroaromatic compound; Borepine; 1H-borepin; Oxatetrazole; Thiatetrazole
[?h?t(?)r?(?)'s??kl?k, -'s?kl?k]
¦ adjective Chemistry denoting a compound whose molecule contains a ring of atoms of at least two elements (one of which is generally carbon).
