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102 Lecture Ch11
102 Lecture Ch11

... • Many organic compounds (CH4, C6H6, CH3OCH3 etc.) - are insoluble in water (soluble in organic solvents) - do not ionize in water (nonelectrolytes if soluble) ...
Carbon Compounds
Carbon Compounds

... • Each hydrocarbon has its structural formula; its kind, number and arrangement of atoms in a molecule. • Isomers; are compounds that have the same chemical formula but different structural formula. ...
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Functional Groups - Madison County Schools
Functional Groups - Madison County Schools

... • Functional group with a carbon double-bonded to an oxygen atom • Polar group, making molecules water-soluble • Functional group found in sugars. If carbonyl group is at the end of the carbon chain, the molecule is a Aldehyde, otherwise it is an Ketone. • Ex. Propanol (aldehyde) and acetone (ketone ...
Chapter 2 - Speedway High School
Chapter 2 - Speedway High School

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... the corners. This triangular faced structure is very strong as well as versatile. Carbon often bonds with itself to form a variety of large structure molecules with ring, wall, and tube shapes, perfect for building complex diverse morphologies (body structures) of living organisms. Finally, many, if ...
Naming Straight Chain Alkanes (C
Naming Straight Chain Alkanes (C

... ANOTHER WAY ...
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Ch 2

...  R group (repeating ______________ of different lengths)  _________________: 2 amino acids bound together covalently by _____________________(a molecule of H2O is lost) – held together by peptide bonds ...
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Types of Chemical Reactions

... AB+C single replacement (sometimes called single displacement): atoms of one element replace atoms of another in a compound: A + BC  AC + B Most often, AC and BC are ionic compounds, which means A and B are metals, and C is a nonmetal or negative polyatomic ion. As an analogy, imagine that BC are ...
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Mr. Farnworth

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Mass Spectrometry and Infrared Spectroscopy
Mass Spectrometry and Infrared Spectroscopy

... Peak that corresponds to the unfragmented radical cation is parent peak or molecular ion (M+) ...
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5.3 Note Outline

... Organic compounds always contain carbon, and almost always contain hydrogen as well. Organic chemistry is the study of compounds that contain carbon. Organic compounds may, or may not, come from living organisms. Carbon is what they all have in common. ...
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Writing Formulas

...  Remember the algebraic sum of the ions' oxidation numbers must equal zero. (Balance)  Learn the polyatomic ions.  Learn those ions with multiple oxidation numbers and use Roman numerals to indicate the charge. ...
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Chapter 4

... Belief in a life force outside the jurisdiction of physical and chemical laws Performed an experiment that demonstrated the spontaneous synthesis of organic compounds ...
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Chapter 4 Notes

... 4. shared electrons = full valence shell 5. atoms may share ____ than one pair of electrons a. double covalent bond – ____ shared electrons b. triple covalent bond – ____ shared electrons D. Polyatomic ions 1. group of _________ bonded atoms 2. either ______ or _____ electrons ...
chapter 6 sec 2 resonance structure
chapter 6 sec 2 resonance structure

... H is 2.1 and O is 3.5. 3.5 – 2.1 = 1.4 so the bond between H and O is a polar covalent bond. By definition a neutral group of atoms held together by covalent bonds is a molecule. So, the H2O particle is a molecule H2O is a molecule which makes H2O a molecular compound and a molecular formula. But H2 ...
Exam 2 with Solutions - Little Dumb Doctor .Com
Exam 2 with Solutions - Little Dumb Doctor .Com

... 16. Consider the diatomic molecules of the second period Li2, Be2, and C2. Which is (are) unlikely to exist? c. Be2 17. In order to create a p-type semiconductor, a silicon crystal could be doped with a. Ga 18. The following molecular orbital energy level diagram is appropriate for which one of the ...
8.3 * Organic Compounds - Science 10 With Mr. Francis
8.3 * Organic Compounds - Science 10 With Mr. Francis

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Simple Organic Compounds: Alkanes Objective Organic Chemistry
Simple Organic Compounds: Alkanes Objective Organic Chemistry

... The variety of bonds that can be formed by carbon, make it a very versatile element. · Four bonding electrons · Multiple bonds with itself and other elements · Many forms including chains, spheres, tubes, and rings. ...
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... How many protons and electrons are in 13 Al ? ...
virtual library of biological active molecules
virtual library of biological active molecules

... program is used for the creating of catalogue. Using program ISIS 2.3 (MDL Information Systems, Ltd.) graphical images of molecular structures are creating. “Octane” type graphical workstations are using for support of the working with amounts of graphical images. Current base is saving on the serve ...
Chemical Bonding
Chemical Bonding

... Metals usually want to give electrons (electron doners) » Becomes positively charged ion (cation) Non-Metals usually want to take electrons (electron receivers) » Becomes negatively charged ion (anion) » Changes name suffix to –ide (e.g.ChlorineChloride) The metal will donate the electron to the n ...
Chemical Bonding
Chemical Bonding

... Metals usually want to give electrons (electron doners) » Becomes positively charged ion (cation) Non-Metals usually want to take electrons (electron receivers) » Becomes negatively charged ion (anion) » Changes name suffix to –ide (e.g.ChlorineChloride) The metal will donate the electron to the n ...
ch02-chemistry
ch02-chemistry

... Questions 2-4 (Matching)-- Match the following terms to their respective statement below. A. Ionic bond B. Covalent bond C. Hydrogen bond 2. _______ Two hydrogen atoms share valence electrons to form a hydrogen molecule 3. _______ A weak attraction between a slightly positive hydrogen atom in one mo ...
Hints for Names and Formulas (Ch. 4 in Zumdahl Chemistry)
Hints for Names and Formulas (Ch. 4 in Zumdahl Chemistry)

... ● only 10 elements exist as molecules when free in nature: H2, N2, O2, F2, Cl2, Br2, I2, At2, P4, S8 ● these 10 elements may have different subscripts when in combination with other elements ◘ examples: H2O, CO, CCl4, CaBr2 (ionic), Na2O (ionic) ◘ reaction: 4 Na(s) + O2 (g) → 2 Na2O(s) (3) molecules ...
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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.
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