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Allogenes is a series of Gnostic texts. [1] [2] The main character in these texts is Allogenes (Greek: ἀλλογενής), which translates as 'stranger,' 'foreigner,' or 'of another race.' [3] [4] The first text discovered was Allogenes as the third tractate in Codex XI of the Nag Hammadi library. [5]
This suggests an origin for the efficacy of NHC transfer chemistry from Ag NHC complexes, with weaker M-NHC bonds in addition to the straightforward synthetic route described previously. [5] Further charge-decomposition analysis of the three model complexes suggests that the- major contribution to covalent bonding arises from the NHC to M σ ...
A Generic NHC Boryl Anion. An N-heterocyclic carbene boryl anion is an isoelectronic structure of an N-heterocyclic carbene (NHC), where the carbene carbon is replaced with a boron atom that has a -1 charge. [1] NHC boryl anions have a planar geometry, and the boron atom is considered to be sp 2-hybridized.
In coordination chemistry, a transition metal NHC complex is a metal complex containing one or more N-heterocyclic carbene ligands. Such compounds are the subject of much research, in part because of prospective applications in homogeneous catalysis. One such success is the second generation Grubbs catalyst. [1] IMes is a popular NHC ligand.
The most studied mesoionic carbenes are based on imidazole and are referred to as imidazolin-4-ylidenes. These complexes were first reported by Crabtree in 2001. [7] The formation of imidazolin-4-ylidenes (MIC) instead of imidazolin-2-ylidenes (NHC) is typically a matter of blocking the C2 position.
Allogenes: 40–44: Allogenes: The title is at the end of the tractate. The account of Allogenes of a revelation received from the angel Jude, and of an ascent to heavenly beings. 47: 4: Hypsiphrone: 45–69: Hypsiph. The title is at the beginning of the text, which is very poorly preserved. The book of visions of Hypsiphrone. 48 NHC-XII 1: The ...
1,3-Dimesityl-imidazol-4,5-dihydro-2-ylidene, a representative persistent carbene. A persistent carbene (also known as stable carbene) is an organic molecule whose natural resonance structure has a carbon atom with incomplete octet (a carbene), but does not exhibit the tremendous instability typically associated with such moieties.
NHC II, the end of the Apocryphon of John, the beginning of the Gospel of Thomas NHC II, the end of the Gospel of Thomas. Nag Hammadi Codex II (designated by siglum CG II) is a papyrus codex with a collection of early Christian Gnostic texts in Coptic (Sahidic dialect). [1] The manuscript has survived in nearly perfect condition.