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There is a preference for the leaving group to be on a primary carbon, but, if the base is strong enough, an E2 reaction can still take place on a tertiary carbon. There will be much more on this next chapter. There must be a neighboring anti-periplanar hydrogen to the leaving group in order for an E2 reaction to occur.
- If there is steric crowding on the substrate near the leaving group, such as at a tertiary carbon centre, the substitution will involve an S N 1 rather than an S N 2 mechanism, (an S N 1 would also be more likely in this case because a sufficiently stable carbocation.
- B) a compound of formula C5H12 with one tertiary carbon atom. C) 1-ethyl-5-methylspiro2.4heptane. D) the best chair conformation of trans-1,3-dimethylcyclohexane. E) the best Lewis structure for HCNO (bonded in that order).
Related to tertiary: Tertiary period, tertiary prevention
ter·ti·ar·y
(tûr′shē-ĕr′ē)adj.2. Of, relating to, or designating the short flight feathers nearest the body on the rear edge of a bird's wing.
3. Chemistrya. Of, relating to, or having a carbon atom that is attached to three other carbon atoms in a molecule.
b. Of or relating to the replacement of three of several atoms or groups in a compound, such as an amine in which three valences of the functional group are taken by carbon atoms.
c. Of or relating to salts of acids containing three replaceable hydrogen atoms.
4. Tertiary Of, relating to, or being the period of geologic time from about 66 to about 2.6 million years ago, the older of the two periods of the Cenozoic Era. The Tertiary Period is characterized by the appearance of modern flora, insects, fish, amphibians, and reptiles, and by the dominance of mammals as vertebrate life forms on land. See Table at geologic time.
n.pl.ter·ti·ar·ies2. Tertiary The Tertiary Period.
3. Roman Catholic Church A member of a religious Third Order.
[Latin tertiārius, from tertius, third; see trei- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
tertiary
(
ˈtɜːʃərɪ) adj
2. (Education) (of education) taking place after secondary school, such as at university, college, etc
3. (Economics) (of an industry) involving services as opposed to extraction or manufacture, such as transport, finance, etc. Compare primary8b, secondary7
4. (Roman Catholic Church) RC Church of or relating to a Third Order
5. (Chemistry) chema. (of an organic compound) having a functional group attached to a carbon atom that is attached to three other groups
b. (of an amine) having three organic groups attached to a nitrogen atom
c. (of a salt) derived from a tribasic acid by replacement of all its acidic hydrogen atoms with metal atoms or electropositive groups
6. (Zoology) ornitholrare Also called: tertial of, relating to, or designating any of the small flight feathers attached to the part of the humerus nearest to the body
n, pl-tiaries7. (Zoology) ornitholrare Also called: tertial any of the tertiary feathers
8. (Ecclesiastical Terms) RC Church a member of a Third Order
[C16: from Latin tertiārius containing one third, from tertius third]
Tertiary
Tertiary Carbon Pka
(ˈtɜːʃərɪ) adj (Geological Science) of, denoting, or formed in the first period of the Cenozoic era, which lasted for 63 million years, during which mammals became dominant
n (Geological Science) the Tertiary the Tertiary period or rock system, divided into Palaeocene, Eocene, Oligocene, Miocene, and Pliocene epochs or series
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ter•ti•ar•y
(ˈtɜr ʃiˌɛr i, -ʃə ri)adj., n., pl. -ar•ies.adj.
1. of the third order, rank, stage, formation, etc.; third.
2. a. noting or containing a carbon atom united to three other carbon atoms.
b. formed by replacement of three atoms or groups.
3. (cap.) noting or pertaining to the earlier period of the Cenozoic Era, beginning about 65 million years ago, during which mammals gained ascendancy.
5. noting or pertaining to a Third Order.
n. 7. tertial
[1540–50; < Latin tertiārius of third part or rank]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Ter·ti·ar·y
(tûr′shē-ĕr′ē) The first period of the Cenozoic Era, from about 65 to 2 million years ago, characterized by the appearance of most modern classes of plants and mammals. See Chart at geologic time.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
| Noun | 1. | Tertiary - from 63 million to 2 million years ago Age of Mammals, Cenozoic, Cenozoic era - approximately the last 63 million years Pliocene, Pliocene epoch - from 13 million to 2 million years ago; growth of mountains; cooling of climate; more and larger mammals Miocene, Miocene epoch - from 25 million to 13 million years ago; appearance of grazing mammals Oligocene, Oligocene epoch - from 40 million to 25 million years ago; appearance of sabertoothed cats Eocene, Eocene epoch - from 58 million to 40 million years ago; presence of modern mammals Paleocene, Paleocene epoch - from 63 million to 58 million years ago; appearance of birds and earliest mammals |
| Adj. | 1. | tertiary - coming next after the second and just before the fourth in position ordinal - being or denoting a numerical order in a series; 'ordinal numbers'; 'held an ordinal rank of seventh' |
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
terciární
harmadfokú
trešās pakāpes-
terciálny
tertiary
[ˈtɜːʃərɪ]ADJ2. (Educ) tertiary education → enseñanzafsuperior
3. (Geol) [rocks, deposits] → terciario
the Tertiary period → la época terciaria
the Tertiary period → la época terciaria
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
tertiary
[ˈtɜːrʃəri]adj [studies] → supérieur(e)Tertiary Carbon E2
; [course, qualification] → de l'enseignement supérieurtertiary college, tertiary educationtertiary college n(British)établissement accueillant des élèves de terminale et dispensant une formation professionnelletertiary education n(British) → enseignementmsupérieurtertiary sector nthe tertiary sector → le secteur tertiaire
Collins English/French Electronic Resource. © HarperCollins Publishers 2005
tertiary
adj → tertiär; tertiary education (Brit) → Universitätsausbildungf
tertiary
:tertiary burns
tertiary colour
Tertiary period
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
tertiary
[ˈtɜːʃərɪ]adj (gen) → terziario/atertiary education (Brit) → educazionefsuperiorepost-scolastica
tertiary sector (Industry) → settoremterziario
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
tertiary
(ˈtəːʃəri) adjective of or at a third level, degree, stage etc. Tertiary education follows secondary education. tersiêr ثُلاثي третичен terciário terciární tertiär tredje- τριτοβάθμιοςterciario kolmanda astme سومین؛ ثالث tertiäärinen tertiaireשלישי तीसरी श्रेणी का tercijaran, koji pripada trećem redu harmadfokú; felsőfkú tingkat tiga þriðja stigs terziario 第３次[]の 제3의 trečio laipsnio, trečios pakopos trešās pakāpes- tinggi tertiair i tredje rekke, tertiær- trzeciorzędny, trzeciego stopnia terciário superior; terţiar третьеступенчатый terciárny tretjestopenjski tercijalan som kommer i tredje hand, tertiär ลำดับที่สาม üçüncü derecede/sırada olan 第三的, 第三級的 третинний تيسرے درجے کا thứ ba 第三的，第三级的
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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