Question

Analytical Data Sheet for Experiment 6 (Methyl Orange synthesis) Compound Name Sodium, 4-1(4-dimethyl- amino)phenyldiazenyl]- benzenesulfonate Formula Structure TLC R value V d Molar Mass (&/mol TLC eluant Color and Form Melting Pointr'c H NMR (300 MHz, solvents CO,) | ! Peak assinl С NMR (300 MHz, solvent adl multiplicity-of H δ1PPm1 Peak assign 7.79-7.72 6.83 3.05 152.6 152.3 149.1 142.8 126.5 124.6 121.0 FT-IR (NaCI) % relative T inten Ion assignment (structure of Wavenumber [cm 1 Bond assignment - m/z 304.2 3436 1608 289.0 1193 1121+ 1064+ 1036 156.1

Please, i need help with this experiment’s analytical data.

Answer 1

Molecular formula C₁₄H₁₄N₃SO₃^-Na⁺

Molar mass- 327g/mol (with sodium salt).

Color and form- Orange color solid

Yield- To be calculated from experimental data

H NMR data

7.79-7.72 ppm - protons (4H) of aromatic ring (attached with sulphonate structure) with multiplet signal

6.83 ppm - protons (4H) of aromatic ring (attached with dimethyl amine) with multiplet signal

3.05ppm - Protons of methyl group of dimethyl amine. for 6H and signal is singlet

C NMR data Carbon number of the structure indicated in front of values. There is no indication of methyl C in NMR data

152.6     C-IV            152.3 C-X

149.1     C-I          142.8 C-VII

126.5    C-II,VI            124.6 C-III,V

121     C-VIII,XII            111.6 C-IX,XI

Mass Data

m/z of 304.2 is for 4-{(4-dimethylamino)phenyldiazenyl}-benzenesulfonate ion (whole structure without sodium ion 327-23= 304)

m/z of 289 is for 4-{(4-methylamino)phenyldiazenyl}-benzenesulfonate ion (whole structure without sodium ion and one methyl group 327-23= 304-15= 289)

m/z= 156 is for benzenesulfonate ion (327-23= 304-148=156)

FTIR Data

3436 cm-1 is for secondary amine streaching peak

1608 cm-1 is the characteristic region peak for C=C aromatic bond

1193-1036 cm-1 is weak peak of bending vibrations of methyl group