Definitions for nor-
nor-

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1. nor-prefix

   a compound derived from another by removal of a radical, especially by removal of methyl or methylene

WikipediaRate this definition:0.0 / 0 votes

1. Nor-

   In chemical nomenclature, nor- is a prefix to name a structural analog that can be derived from a parent compound by the removal of one carbon atom along with the accompanying hydrogen atoms. The nor-compound can be derived by removal of a CH3, CH2, or CH group, or of a C atom. The "nor-" prefix also includes the elimination of a methylene bridge in a cyclic parent compound, followed by ring contraction. (The prefix "homo-" which indicates the next higher member in a homologous series, is usually limited to noncyclic carbons). The terms desmethyl- or demethyl- are synonyms of "nor-". "Nor" is an abbreviation of normal. Originally, the term was used to denote the completely demethylated form of the parent compound. Later, the meaning was restricted to the removal of one group. Nor is written directly in front of the stem name, without a hyphen between, unless there is another prefix after nor (for example α-). If multiple groups are eliminated the prefix dinor, trinor, tetranor, etcetera is used. The prefix is preceded by the position number (locant) of the carbon atoms that disappear (for example 2,3-dinor). The original numbering of the parent compound is retained. According to IUPAC nomenclature, this prefix is not written with italic letters and unlike nor, when it is a di or higher nor, at the end of the numbers separated by commas, a hyphen is used (as for example 2,3-dinor-6-keto Prostaglandin F1α is produced by beta oxidation of the parent compound 6-keto Prostaglandin F1α). Here, though, carbon 1 and 2 are lost by oxidation. The new carbon 1 has now become a CCOH similar to the parent compound, looking as if just carbon 2 and 3 have been removed from the parent compound. "Dinor" does not have to be reduction in adjacent carbons, e.g. 5-Acetyl-4,18-dinor-retinoic acid, where 4 referred to a ring carbon and 18 referred to a methyl group on the 5th carbon on the ring.The alternative use of "nor" in naming the unbranched form of a compound within a series of isomers (also referred to as "normal") is obsolete and not allowed in IUPAC names.

How to pronounce nor-?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say nor- in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of nor- in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of nor- in Pythagorean Numerology is: 2

Examples of nor- in a Sentence

1. Chancellor Werner Faymann:

   Subsidies exist to support new and modern technologies which are in the interest of all EU states. This does not apply in any way to nuclear power, nuclear power plants are dangerous, expensive and -- compared with ... wind, hydro and solar energy -- neither economically nor ecologically competitive.

2. Kash Patel:

   Calling a foreign counterpart and discussing operational capabilities against that enemy is literally treasonous, the White House, nor the Office of the Secretary of Defense authorized the chairman to conduct any calls with Chinese officials regarding operations.

3. Epicurus:

   He who is calm disturbs neither himself nor others.

4. Catherine Smallwood:

   We do not recommend immunity passports, nor do we recommend testing as a means to prevent transmission across borders.

5. Mohammed Abrini:

   In this evil that happened in France, I am neither the commander nor the architect. I provided no logistical nor financial help.

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Nor-
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Nor-