• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
1. Organic chemistry is the study of carbon compounds.
1. Organic chemistry is the study of carbon compounds.

... There are six functional groups that are most important to the chemistry of life: hydroxyl, carbonyl, carboxyl, amino, sulfhydryl, and phosphate groups. All are hydrophilic and increase the solubility of organic compounds in water. In a hydroxyl group (—OH), a hydrogen atom forms a polar covalent bo ...
Organic Chemistry1
Organic Chemistry1

... formula but different molecular structures – Structural Isomers: compounds that have the same molecular formula, but the atoms are joined together in a different order Differ in physical properties like boiling and melting points ...
Click for Section 2.9 notes
Click for Section 2.9 notes

... 2.9 Some Simple Organic Compounds Organic chemistry: study of C compounds • Alkanes contain only C and H and are called hydrocarbons • The names of alkanes all end in the suffix –ane • Alkanes are named according to the number of C atoms in their backbone chain: ...
Sample % Sulfate Absolute Deviation A 44.02 B 44.11 C 43.98 D
Sample % Sulfate Absolute Deviation A 44.02 B 44.11 C 43.98 D

... mass prove that two samples are the same compound? ...
ACA__Beat_sheet_bonding_2016
ACA__Beat_sheet_bonding_2016

... Determine if the following properties are ionic, covalent, or metallic bonding. Some may have multiple answers. I, C, or M ...
Science-M2-Basic-Che..
Science-M2-Basic-Che..

... Intermolecular forces are also called Van der Waals forces, named after the Dutch physicist who first discovered them. Hydrogen bonds are a type of Van der Waals force, and represent an important bond in biochemistry. ...
Document
Document

... Strong Strong Strong Strong Strong [Broad] ...
Chemical bonds
Chemical bonds

... Atoms are the basic building blocks of all types of matter. They link to other atoms through chemicals bonds resulting from the strong attractive forces that exist between the atoms. Chemical bonds are defined as a set of interactions that take place in the electron shell of atoms, in order to join ...
Chapter 4 Carbon
Chapter 4 Carbon

... Found to be teratogen Was found in some animals that only the S stereoisomer is teratogenic – but turns out they both are. ...
Structure of chemical compounds
Structure of chemical compounds

... • electron pair (bonding electrons) is shared between two atoms • molecular orbital is formed by ovelapping of atomic orbitals of two atoms • electronegativity of atoms must be similar : nonpolar covalent bond – both atoms are equally electronegative polar covalent bond – one atom is more electroneg ...
CHEMISTRY OF MAIN GROUP ELEMENTS Classification -1 s
CHEMISTRY OF MAIN GROUP ELEMENTS Classification -1 s

In-Class Exam - Fayetteville State University
In-Class Exam - Fayetteville State University

... 16. There are _______ atoms of oxygen in 300 molecules of CH3CO2H. A) 1.80x1026 B) 300 C) 3.01x1024 D) 600 E) 6.02x1023 17. A compound that is composed of only carbon and hydrogen contains 85.7% C and 14.3% H by mass. What is the empirical formula of the compound? A) CH2 B) C2H4 C) C4H8 D) CH4 18. A ...
APBiologySummerisOVERAssignment
APBiologySummerisOVERAssignment

... 1. What is the difference between an element and a compound? 2. What 4 elements make up 96% of living matter? 3. List 5 other elements naturally found in the body. 4. Distinguish between protons, neutrons, and electrons. 5. Write out the electron configuration for an atom of fluorine in the ground s ...
Chapter 2 Practice Questions
Chapter 2 Practice Questions

... E) All of these statements are true according to modern atomic theory. 4. Avogadro's hypothesis states that: A) Each atom of oxygen is 16 times more massive than an atom of hydrogen. B) A given compound always contains exactly the same proportion of elements by mass. C) When two elements form a seri ...
cycloalkanes
cycloalkanes

...  One hydrogen atom has to be removed from each end of the hydrocarbon chain to form the CC bond that closes the ring.  Cycloalkanes therefore have two less hydrogen atoms than the parent alkane and a generic formula of CnH2n. ...
The Chemical Earth
The Chemical Earth

... Pure substances can be further classified into elements and compounds.  Elements are the simplest pure substances consisting of only one type of atom. They cannot be broken down (or decomposed). ...
Unit 2 Notes Name - Mr. Walsh`s AP Chemistry
Unit 2 Notes Name - Mr. Walsh`s AP Chemistry

... o Ionic compounds are soluble in water if the sum of all of their attractions to the water molecules is greater than their attraction to each other. A good rule of thumb (though there are exceptions) is that almost all compounds with alkali metal and halogen ions are soluble. Most (but not all) comp ...
AP Biology Organic Chemistry (Carbon Chemistry)
AP Biology Organic Chemistry (Carbon Chemistry)

... An amino group (-NH2) consists of a nitrogen atom attached to two hydrogen atoms and the carbon skeleton.  Organic compounds with amino groups are amines.  The amino group acts as a base because ammonia can pick up a hydrogen ion (H+) from the solution.  Amino acids, the building blocks of protei ...
Organic Compounds
Organic Compounds

... C=C double bonds are shorter than CC single bonds. X-ray crystallography shows that all C-C bonds in benzene are the same length.  Benzene reacts like an alkane, not like an alkene. ...
Ionic Equations
Ionic Equations

... Chlorides, bromides and iodides are generally soluble {except Pb(II), Ag(I) and Hg(I)} Carbonates and phosphates are generally insoluble (except group I) Hydroxides and sulphides are generally insoluble (except groups I and II) ...
eastern illinois university
eastern illinois university

... 22. Consider the following unbalanced equation: LaCl3 + Na2CO3  La2(CO3)3 + NaCl. When this equation is balanced (simplest whole number coefficients), the coefficient for NaCl is: a. 1 b. 2 c. 3 d. 5 e. 6 23. Consider the balanced, but incomplete, equation: 2AlCl3 + Ca3N22X + 3CaCl2. The formula o ...
Atoms, elements and Compounds
Atoms, elements and Compounds

... niobium is harder; stronger; higher mp/bp; higher density note: there has to be a comparison any two from: chemical niobium is less reactive; forms coloured compounds; forms complex ions; its compounds have catalytic properties; has more than one oxidation state; has more than one valency electron; ...
4 Organic and Biochemical Compounds
4 Organic and Biochemical Compounds

... atom. A carbon atom forms a double bond if it shares two of its electrons with another atom. A carbon atom forms a triple bond if it shares three of its electrons. A carbon atom cannot form more than four total bonds at one time. ...
Chapter 2
Chapter 2

... Dalton’s Atomic Theory Examine Dalton's Atomic Theory. ❶All matter is composed of atoms, indivisible particles that are exceedingly small. ❷All atoms of a given element are identical, both in mass and in chemical properties. However, they are different from atoms of other elements. ❸Atoms are not cr ...
Matter is anything that occupies volume (takes up space) and has
Matter is anything that occupies volume (takes up space) and has

... Chlorine is NOT stable, it has one valence electron it would like obtain In forming an ionic bond, sodium will transfer its one valence electron to chlorine making both atoms stable. Now Na is positive and Cl is negative forming an attraction or ionic bond. Covalent bonds involve the sharing of ele ...
< 1 ... 128 129 130 131 132 133 134 135 136 ... 171 >

Homoaromaticity



Homoaromaticity in organic chemistry refers to a special case of aromaticity in which conjugation is interrupted by a single sp3 hybridized carbon atom. Although this sp3 center disrupts the continuous overlap of p-orbitals, traditionally thought to be a requirement for aromaticity, considerable thermodynamic stability and many of the spectroscopic, magnetic, and chemical properties associated with aromatic compounds are still observed for such compounds. This formal discontinuity is apparently bridged by p-orbital overlap, maintaining a contiguous cycle of π electrons that is responsible for this preserved chemical stability.The concept of homoaromaticity was pioneered by Saul Winstein in 1959, prompted by his studies of the “tris-homocyclopropenyl” cation. Since the publication of Winstein's paper, much research has been devoted to understanding and classifying these molecules, which represent an additional “class” of aromatic molecules included under the continuously broadening definition of aromaticity. To date, homoaromatic compounds are known to exist as cationic and anionic species, and some studies support the existence of neutral homoaromatic molecules, though these are less common. The 'homotropylium' cation (C8H9+) is perhaps the best studied example of a homoaromatic compound.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report