Molecular Formula C6h2o2

3. The IR spectrum of the starting material shows a medium/strong C-O bond at around 1500cm-1, also the starting material shows a strong C-H bond at around 3000cm-1 and another medium C-H bond at 2865cm-1 indicating an aldehyde group whereas the product does not. The IR spectrum of the product shows a two weak broad O-H peaks at around

- The C-H bonds in this structure are shown at 1444 and 1368cm-1. These two bands indicate the two different types of C-H bends that occur on the molecule. One is that of the alkene and the other is that of the several alkanes on the molecule.

There are four main regions of IR absorptions: region 4000 – 3000 cm-1 corresponds to N-H, C-H and O-H stretching, region 2250- 2100 cm-1 is triple-bond stretching , region 2000- 1500 cm-1 is double bonds and the region below 1500 cm-1 is the fingerprint region where a variety of single bonds are absorbed.3 The chromic acid test is a test for oxidizability and gives a positive result for primary and secondary alcohols as well as aldehydes2. A positive result in the chromic acid test is indicated by a color change and the formation of a precipitate. Tertiary alcohols give negative results for the chromic acid test since there must be a hydrogen present on the alcoholic carbon for oxidation to occur. The 2,4 DNP test, tests for a carbonyl and is therefore a dependable test for aldehydes and ketones. Finally, 13C NMR spectroscopy is a test to determine the structure of a compound. 13C NMR detects the 13C isotope of carbon. Each carbon has a different chemical shift. A carbon’s chemical shift is affected by the electronegativity of nearby atoms. Carbons that are bonded to highly electronegative atoms resonant downfield because the electronegative atom pulls electrons away from the nearby carbons and cause those carbons to resonant downfield1 (John McMurry, 2008). A general trend is that sp3-hybridized carbons absorb from 0 to 90 ppm, sp2-hybridized carbons resonant between 110

If the IR spectra showed that it was an alcohol, Jones Test and Lucas Test can be used. If the IR spectra showed that it was either an aldehyde or ketone, we can use the DNP Test, Jones Test, and Tollens test, to determine which functional group is in the unknown. The IR Spectra can distinctively show the unknown as an alcohol, but cannot distinctively distinguish between aldehyde and ketone, because aldehyde and ketones have similar characteristic absorbances. Therefore, to distinguish between aldehyde and ketone, further chemical tests are needed. In the IR Spectra of unknown #305, it indicated that it was most likely an alcohol, due to the O-H peak at

IR and 1H NMR analysis was also performed for the starting ketone, 4-tert¬-butylcyclohaxanone. The IR spectra, RM-07-Oi, contained peaks at 2947 cm-1, 2868 cm-1, 1720 cm-1, and 1365 cm-1. These peaks represent a carbon-hydrogen stretch, a sp3 hybridized carbon, a ketone and a ring carbon-carbon stretch, which are all present in 4-tert¬-butylcyclohaxanone. This confirms that the initial ketone used was 4-tert¬-butylcyclohaxanone. The 1H NMR also proves this. Peaks found at 2.34 ppm, 2.07 ppm, 1.45 ppm and 0.87 ppm show that only four chemical shifts occur in this compound. There are not four types of hydrogens in this molecule, but some chemical environments are similar resulting in only four

Overall, the experiment went smoothly. Our product’s identity and purity was tested by calculating the density, an alkene test using Bromine Water, and conducting both an IR and a H-NMR spectra. The first test that was conducted was comparing densities between our product and the known density of Limonene. From our data, our product had a density of 0.815 g/mL, which is only 0.027 g/mL off from Limonene’s known density of 0.842 g/mL. Our density may even be closer due to the inaccuracy of having less than one millimeter of product.

This oxygen atom has 4 atoms bonded to it with two lone pairs making it’s molecular shape linear. The similarities in these two molecular structures are that they both are composed of carbon, oxygen and hydrogen. At least one of their central atoms has the tetrahedral shape and also a linear shape. Both of the oxygen atoms in each structure are the atoms with the lone pairs. The differences between the two structures are that the isopropanol molecule has more bonds than the acetic acid.

Analyzing the 13C NMR spectrum of the unknown sample #46, seven distinct signals were studied shown in table (2). Signal 1 had an observed peak value of 21.225 ppm and a calculated peak value11 of 20.8 ppm. Comparing with the literature ppm value5 range 5-30 ppm, signal 1 corresponds with CH3-C=O group. This signal was the second to the most upfield and shielded in the 13C NMR spectrum comparing with signal 7 because of the carbon high electron density. However, it was more downfield than signal 7 due to the presence of the oxygen in the group. Signal 2 had an observed peak value of 171.629 ppm and a calculated peak value10 of 171.0 ppm. Comparing with the literature value5 range 165-180 ppm, signal 2 corresponds with an ester group. Signal 2 is the most downfield and deshielded because the carbonyl group is in between two electronegative oxygens, therefore it could be concluded that there was an ester in the given compound.

The sulfonyl bound benzene (C8-C13) ring forms dihedral angles of 35.5(1)o and 65.6(1)o respectively, with the 2-formylpheneyl (C1-C6) and fluorophenyl (C18-C23) rings. The dihedral angle between fluorophenyl(C18-C23) and 2-formylphenyl(C1-C6) ring is 44.0(1)o. The structural parameter of MFMSF conforms to those reported for similar structure [31]. Fluorine atom F1 is deviated by -0.003(2) Å from the attached benzene ring. The hydrogen bond geometry for MFMSF is listed in Table.2. The molecular structure is stabilized by intramolecular C–H…π interaction between a sulfonyl-bound phenyl H9 atom and a fluorophenyl(C18-C23) ring with a C9–H9…Cg separation of 2.66Å, where Cg is the centroid of the C18-C23 fluorophenyl ring. Also, the molecular conformation is stabilized by weak intramolecular C9–H9...O3, C7–H7...N1 and C17–H17...O5 hydrogen bonds, each generates S(5) ring motifs [32]. In the crystal, four molecules are related by two intermolecular C10–H10…O1i and C25–H25A…O2ii hydrogen bonds, generating ring motifs [32] to form a two dimensional supramolecular network along [110] direction (Fig. 2; Symmetry codes as given in

The crude product was purified by silica gel flash column chromatography using THF:dichloromethane = 1:10 (v:v) as an eluent to afford the product as a white solid. Yield: 5.0 g, 54%. 1H NMR; 13C NMR; HRMS (FAB) calcd. for [M+H]+ 762.3866, Found: 762.3862; Anal. calcd for C50H50N6Si: C, 78.70; H, 6.60; N, 11.01; Si, 3.68.

Structural-wise, it is a hexose that occurs in the nature in a D form and has 16 stereoisomers. It has been isolated for the first time by Andreas Marggraf in 1747 (Martini 2014).

I have developed a broad knowledge of modern organic chemistry and synthetic methods as well as I have gained practical experience with a wide range of bioanalytical techniques and NMR spectroscopic methods for characterizing biomolecules and biopolymers, involving the concepts and methodologies of structure-based molecular design as well as method development for structure elucidation. I have pursued my research in multiple CUNY research groups that focus on materials science, photonics technologies, structural biology, and magnetic resonance spectroscopy. I have conducted collaborative studies with the plant biology laboratory

The Relative Formula Mass of an Unknown Acid Table of contents 1.1 Aim of the experiment 2 1.2 Introduction 2 1.3 Equipments and apparatus 2 1.4 Safety precautions 2 2.1 Procedure 3 2.2 Apparatus setup 3 2.3 Analysis 4 3.1 Implementing

When using nuclear magnetic resonance spectrometry, I had unknown A. With this unknown, I had two peaks on my CNMR which told me I had one carbon on both sides of the line symmetry. Also, on my HNMR I had one peak with a multiplicity of six, therefore, I had six hydrogens. Using this information I was able to conclude that my unknown as was 2-propanone.

We can see that the structural formula of a carboxylic acid can be written two ways. On the left (1), it shows all the carbon, hydrogen and oxygen bonds, while on the right (2), the carbon atom is represented by a