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Organic Chemistry

IR Spectrum Identification: Example Problem

What is the identity of the unknown in the attached IR spectrum. Please provide detailed answer. Other information about the unknown includes: - Clear liquid - Boiling point under 100 C - Insoluble in water, NaOH, and 5% HCL - Soluable in 6M HCl

Lewis Structure of a Diatomic Molecule: Example Problem

N2, CO and BF are neutral diatomic molecules with 10 valence electrons. Draw a Lewis structure of BF that satisfies the octet rule for both atoms. This is important for the rest of the problems I have to do, but I can't manage to properly draw the structure. Also, if you could provide the lewis structures for CO and N2 (I

Chemistry Sample Question: Compound Fragmentations

My group checked with our professor and on problem 4 of the problem set, we needed additional information. For problem 4, I need to have the different fragmentations for both 3,3 dimethylpentane and 2,2 dimethylpropane. By having both fragmentations we will demonstrate that 3,3 was the correct answer.

Having a problem understanding how to do this

Deduce the structure of the compound with the 1H-NMR spectrum shown below. Its molecular formula is C9H12O. If you can't see the multiplicities; from 0 to 7 ppm you have (3H, triplet), (3H, singlet), (2H, quartet), (2H, doublet) and (2H, doublet). (6 pts)

Naming Hydrocarbons

NEED NAME FOR 1. H H H H H C C C C H H H 2. H H C = C C H H 3. H H H H H H CH3 H 4. H C C C H H C C C C C H H H

Spectroscopic Method and Chromatographic Separations

See the attached file. 1) When measured in a 1.00 cm cuvet, a 9.45×10-4 M solution of species A exhibited absorbances of 0.155 and 0.687 at 450 nm and 725 nm, respectively. A 2.65×10-3 M solution of species B gave absorbances of 0.613 and 0.078 at 450 nm and 725 nm, respectively. Both species were dissolved in the same solven

Concentration of Acetic Acid in Vinegar Lab

1. Is acetic acid a strong acid or a weak acid? Write a net ionic equation of acetic acid in water. 2. If a strong base is added to acetic acid, at what pH(acidic, basic, or neutral) will you expect to find the point at which moles of acid are equal to moles of base? 3. Write a net ionic equation of acetic acid with str

Organic Compounds : Condensed Structural Formulas

Draw the following named compounds using condensed structural formulas: a. 4-ethylheptane b. 1,2,2-triethyloctane c. 2,3,3-trimethylbutane d. 4,5-cyclopentane e. 2-methyl-3,7-diiododecane f. 2,4-dibromo-4-ethylpentane g. 2,2-ethyl-5-methyl-3-hexene h. 5-chloro-1-pentene i. ethyne j. propene k. 2,3-methylcyclopentene

Resonance Forms of the Enolate Ion of Acetophenone

In the stepwise trihalogenation process of a methyl group in acetophenone the methyl group in intitially deprotonated. This deprotonation species bears a negative charge on the carbon atom is stabilized by resonance. Show resonance forms and briefly explain.

Prediction of precipitation or solubility

If a precipitate forms when BaCl2 solution is added to a solution of your unknown, which anion is indicated to be present in the unknown? A. Cl- B. NO3- C. C2H3O2- D. SO4 2- Please explain how you arrived at your answer. Thank you. You smell ammonia when NaOH solution is added to a solution of your unknown. Which o

Amino Acids with Two Chiral Centers

Chiral compounds occur when a carbon atom has four different things bonded to it. All but the simplest amino acids (glycine) are chiral because the alpha carbon has an amine group, a carboxylic acid group, and two different groups bonded to it. Some amino acids are even more complicated in that another carbon in the molecule i

Persistent Organic Pollutanants

Question 11 The following molecules are known Persistent Organic Pollutants, which are globally monitored & regulated. Their log(Kow) values, as reported by the United Nations Environmental Protection Agency (UNEP) in 1995, are given here. Where ranges are given, this indicates different values obtained under different enviro

Lighting Cans of Alcohols

1. a. You are presented with three identical metal containers of about 5 litres capacity, each about half full of fuel. The containers have a short neck and are normally closed by a screw cap of about 30mm diameter. The cans contain: (i) petrol (gasoline, flashpoint -43oC), (ii) methyl alcohol (methanol, flashpoint

Nitrogen Atoms, IUPAC Names, and Tetrahedral Representations

For questions 1 and 2, classify each of the nitrogen atoms as primary, secondary, tertiary, or quaternary. For question 3-6, provide the proper IUPAC names. For question 7, convert the following Fischer projection into tetrahedral representations and assign R or S stereochemistry.

Introductory Organic Chemistry: Formulas and Naming

1. Write structural formulas for the following compounds: a. 2,4-dimethylpentane b. 3-bromo-1-chlorohexane c. 1,2-dimethylcyclobutane d. 2-chloro-1-methylcyclohexane 2. Write expanded formulas for the following compounds, and name them, using the IUPAC system: a. CH3CH2C(CH3)2CH3 b. CH3CH2Cl c. CHCl2CHBrCl d. (CH3)3CF

Qualitative Observations of Organic Liquids

1) What do understand by the terms a) Empirical Formula b) isomerism and what conclusions can you draw from the following observations about the chemical nature of the organic liquid D? a) D (relative molecular mass 72 ) has the following persentage composition by mass: Carbon 66.7, hydrogen 11.1, oxygen 22.2 b) D gives an

Organic Chemistry and HNMR Spectrum

1. A proton that absorbs radio frequency radiation at higher field strength will appear _____ in a 1H NMR spectrum. a. at 0 ppm b. downfield (away from TMS) c. upfield (closer to TMS) d. at 7.27 ppm just like CDCl3 2. The carbonyl peak of benzaldehyde appears as a very strong and intense peak at 1703 cm^-1. Normally the

C-13 NMR and GC of 3-Pentanol and 2-Pentene

A) Why is GC not able to distinguish between the trans vs. cis-2-pentene products? b) Explain why the 3-pentanol 13C-NMR spectrum contains three peaks while the trans and cis-2-pentene spectra contain five peaks (note that 13C-NMR gives a peak for each unique carbon, i.e. identical carbons show up as the same peak).

Evaporation and Its Effects on PCP and Cresol

We are asked to explain the phenomena of how 1 gram of liquid water at 35 degrees C (as in a pond or lake) evaporating into an overlying air mass at a temp of 65 degrees C and a relative humidity of 50%. What actually causes the evaporation of water and how can this be calculated in this instance?? What is the vapor pressure

13C NMR and 1H NMR Equivalency of Carbons and Protons

Please see the attached file for the complete problems. 1. For the compound below tell how many signals you would expect the molecule to have in its normal, broadband decoupled 13C NMR spectra. 2. Identify the indicated sets of protons as unrelated, homotopic, enantiotopic, or diastereotopic. 3. For the compounds below

the solubility of silver phosphate in pure water and Na3PO4

Silver Phosphate, Ag3PO4, is an ionic compound with a solubility product constant Ksp of 206 x 10 ^ - 18. Calculate the solubility of this compound in: a) pure water b) 0.2 mol L-1 or 0.2 M Na3PO4 I was able to solve part a, I got the solubility of silver phosphate in water to be 1.76 x 10 ^ -5 M. I am not sure how

Organic Chemistry

1. Draw structural diagrams and give the names for the isomers of pentane. 2. When 2-butene reacts with hydrogen chloride gas, only one product is detected, whereas when 1-butene reacts similarly, two products are usually found. Explain this. 3. Geometric isomers exist in the alkenes but not in the alkynes. Explain why.

NMR Tree Diagram

In this problem the H NMR spectrum of styrene oxide shows that protons 1, 2, and 3 all have different chemical shift values. Proton 2 is coupled to both proton 1 (J= 5.8 Hz) and proton 3 (J=2.5 Hz). Draw a scale tree diagram and your best rendering of the resulting peaks for proton 2. See attached file for full problem desc

Crystallization of Sulfanilamide

We are performing an experiment involving the crystallization of sulfanilamide using 95% ethyl alcohol as the solvent. I am having trouble creating a hypothesis and I wanted your help on creating one. The graph attached on the scan will help.

Using the Hückel rule for aromaticity

On the basis of the Hückel rule for aromaticity, decide whether each of the attached compounds is aromatic or not, and state why. Note: If you have the correct answer but the wrong reason, you will get no credit.

Organic Chemistry and E and Z

2. Develop a four point argument to predict whether O or N is thermodynamically more basic in the following structure (See attachment for structural formula) 3. Predict whether the E or Z will be produced by E2 elimination for the following structure (1-bromo-1,2 -diphenylpropane). Use wedge and dashed line of Newman or sawho