Organic Spectroscopy

ABC26OR0947 · An organic compound (MF = C8H10O) exhibited the following 1H NMR spectral data: delta 2.5 (3H, s), 3.8 (3H, s), 6.8 (2H, d, J = 8 Hz), 7.2… · DEC 2011

ABC26OR0975 · An organic compounds shows following spectral data: IR (cm-1): 1680 1 H NMR (CDCl3): delta 7.66(m, 1 H), 7.60(m, 1 H), 7.10(m, 1 H)… · JUNE 2015

ABC26OR0976 · The structure of the compounds that matches the 1H ~ NMR data given below is 1 H ~ NMR ~ DMSO-d6: delta 7.75 dd, J=8. 8, 2. 4 Hz, 1H, 7… · DEC 2015

ABC26OR0131 · The correct structure of the compound based on the following characteristic spectral data is IR: 1736 cm-1 1H NMR: delta 3.59 (s, 3H), 3.32… · JUNE 2017

ABC26OR0987 · The correct structure of the compound based on the following characteristic spectral data is IR: 1736 ~ c m-1 1 H ~ NMR: delta 3.59(s, 3… · JUNE 2017

ABC26OR1006 · The structure of the compound which displays the following spectral data is IR = 1690, 1100 cm-1 1H NMR: delta 2.8 (s, 3H), 3.8 (s, 3H)… · DEC 2019

ABC26OR0121 · In the mass spectrum of the compound given below, during the alpha -cleavage, the order of preferential loss of groups is: · JUNE 2011

ABC26OR0123 · In the IR spectrum of p-nitrophenyl acetate, the carbonyl absorption band appears at · DEC 2012

ABC26OR0955 · In the IR spectrum of p-nitrophenyl acetate, the carbonyl absorption band appears at · DEC 2012

ABC26OR0957 · In the IR spectrum, the absorption band due to carbonyl group in phenyl acetate appears at · JUNE 2013

ABC26OR0127 · In the IR spectrum of p-nitrophenyl acetate, the carbonyl absorption band appears at · DEC 2013

ABC26OR0960 · In the IR spectrum of p-nitrophenyl acetate, the carbonyl absorption band appears at · DEC 2013 self-practice

ABC26OR0973 · Intense band generally observed for a carbonyl group in the IR spectrum is due to · JUNE 2015

ABC26OR1002 · In IR spectrum, recorded neat, a compound shows a strong and broad band at 3300 cm-1. The band becomes sharp and shifts to 3600 cm-1 when… · DEC 2019

ABC26OR0138 · The frequency of O-H stretch occurs at 3600 cm-1. The O-D stretch frequency (in cm-1) would be closest to · DEC 2019

ABC26OR1004 · The frequency of O-H stretch occurs at 3600 cm-1. The O-D stretch frequency (in cm-1) would be closest to · DEC 2019

ABC26OR1008 · The correct order of carbonyl stretching frequency of the given compounds is A B C · DEC 2019

ABC26OR1010 · The correct order of C=O stretching frequency in IR spectrum for the following compound is A B C · JUNE 2021

ABC26OR0942 · In the mass spectrum of dichlorobenzene the ratio of the peaks at m/z 146, 148 and 150, is: · JUNE 2011

ABC26OR0946 · In the mass spectrum of dodecahedron (C20 H20), approximate ratio of the peaks at m / z=260 and 261 is · DEC 2011

ABC26OR0966 · The mass spectrum of the product A, formed in the following reaction, exhibits M, M + 2, M + 4 peaks in the ratio of about 1 : 2 : 1. The… · JUNE 2014

ABC26OR0128 · The mass of metastable ion produced due to decomposition of F1^+ in the following mass fragmentation sequence is Diethyl-phthalate (M +… · DEC 2014

ABC26OR0968 · The mass of metastable ion produced due to decomposition of F1 + in the following mass fragmentation sequence is Diethyl-phthalate → F1 + →… · DEC 2014

ABC26OR0979 · In the mass spectrum of 1,2-dichloroethane, approximate ratio of peaks at m/z values 98, 100, 102 will be · DEC 2015

ABC26OR0139 · The compound that shows peaks in the EI mass spectrum at m/z 121, 105, 77, 44 is · DEC 2019

ABC26OR0941 · In the broad band decoupled 13C NMR spectrum, the numbers of signals apperating for the bicyclooctane A-C, respectively are (A) (B) (C) · JUNE 2011

ABC26OR0950 · The number of signals that appear in the broadband decoupled 13C NMR spectrum of phenanthrene and anthracene, respectively are · JUNE 2012

ABC26OR0125 · In the broad band decoupled 13C NMR spectrum, the number of signals appearing for the two pyrene diols A and B (A) (B) · JUNE 2013

ABC26OR0969 · The ratio of the relative intensities of the carbon signals in the first order 13C NMR spectrum of CD3Cl is · DEC 2014

ABC26OR0974 · Number of signals in the 13C{1H} NMR spectrum of (R)-4-methylpentan-2-ol are · JUNE 2015

ABC26OR0992 · Number of signals observed in the 13C NMR spectrum of the following compound is · JUNE 2018

ABC26OR0944 · An organic compound A (C8 H16 O2) on treatment with an excess of methyl-magnesium chloride generated two alcohols B and C, whereas reaction… · JUNE 2011

ABC26OR0945 · In the IR spectrum, carbonyl absorption band for the following compound appears at · DEC 2016

ABC26OR0949 · Appropriate 1H NMR chemical shifts (delta) for the protons A-D for the following compound are B A · DEC 2011

ABC26OR0951 · In the 400 MHz, 1H NMR spectrum of organic compound exhibited a doublet. The two lines of the doublet are at delta 2.35 and 2.38 ppm. The… · JUNE 2012

ABC26OR0122 · Match the following · JUNE 2012

ABC26OR0953 · Match the following · JUNE 2012

ABC26OR0126 · An organic compound exhibited the following 1H NMR spectra data: delta : 7.80(2H, d, J=8 Hz), 6.80(2H, d, J=8 Hz), 4.10(2H, q, J=7.2 Hz)… · JUNE 2013 self-practice

ABC26OR0961 · An organic compound having the molecular formula C10 H14 exhibited two singlets in the 1 H NMR spectrum, and three signals in the 13 C NMR… · DEC 2013

ABC26OR0963 · Methyl 4-oxopentanoate exhibited signals at delta 208, 172, 51, 37, 32 and 27 ppm in its 13 C NMR spectrum. The signals due to the methoxy… · DEC 2013

ABC26OR0972 · The 1H NMR spectrum of a dilute solution of a mixture of acetone and dichloromethane in CDCl3 exhibits two singlet of 1:1 intensity. Molar… · JUNE 2015

ABC26OR0978 · The number of chemical shift non-equivalent protons expected in 1H NMR spectrum of alpha -pinene is alpha -pinene · DEC 2015

ABC26OR0980 · In the 1H NMR spectrum of myrtenal, the two methyl groups are expected to display signals at (chemical shift values delta in ppm) myrtenal · JUNE 2016

ABC26OR0129 · 1H NMR spectrum of an organic compound recorded on a 500 MHz spectrometer showed a quartet with line positions at 1759, 1753, 1747, 1741… · DEC 2016

ABC26OR0982 · 1H NMR spectrum of an organic compound recorded on a 500 MHz spectrometer showed a quartet with line positions at 1759, 1753, 1747, 1741… · DEC 2016

ABC26OR0984 · 1H NMR spectrum of a mixture of benzene and acetonitrile shows two singlets of equal integration. The molar ratio of benzene: acetonitrile… · DEC 2016

ABC26OR0130 · 13C NMR spectrum of DMSO-d6 gives a signal at delta 39.7 ppm as a · JUNE 2017

ABC26OR0986 · 13C NMR spectrum of DMSO-d6 gives a signal at delta 39.7 ppm as a · JUNE 2017

ABC26OR0134 · The reaction of [(eta 5-C5H5)Fe(CO)2] with CH3I gives compound A. The 1H NMR spectrum of A shows two singlets in an integrated intensity… · JUNE 2018

ABC26OR0993 · The reaction of [ (eta 5-C5 H5) Fe (CO2)] with CH3 I gives compound A. The 1 H NMR spectrum of A shows two singlets in an integrated… · JUNE 2018