Electrons spin reasonance was discorved by Zacoisky Block Purcell Anderson The E

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Electrons spin reasonance was discorved by Zacoisky Block Purcell Anderson The ESR signal intensity .is directly proportional to Delta n which is inversely proportional to Pressure Temperature Energy Non The removal of degeneracy of spin states by the internal magnetic field of paramagnetic electrons is termed as Fine splitting Zero-field splitting Both (a) and (b) Hyper fine splitting The number ESR lines for the triphenyl methyl radical are 196 150 156 106 The non-magnetic isotopes of Mo(Mo94 Mo96) with I = 0 exhibit 6 ESR lines 1 ESR line 5 ESR lines 2 ESR lines [Hint. 2 times 0 + 1 = 1 ESR line]. For a ESR instrument that operates at a frequency of 70 GHz, the static magnetic field required is 70 KG 50 KG 25 KG 30 KG The pie-spin density on carbon atom in the planar ring system of anthracene is + 0.122 122 -0.152 + 0.192 The coupling constants for the o,m,p protons in (C6H5)3C are - 0.93, + 0.46 and - 0.93 G respectively. If Q = - 23.9 G the pie-spin densities for the respective ring protons are + 0.039 (o,p), - 0.019 (m) + 0.019 (o,p), - 0.039 (m) + 0.93 (o,p), - 0.46 (m) + 0.53 (o,p),- 0.35 (m) For two equivalent protons, the number of lines are 2n 2 nI 2nI+1 2n2 The ESR lines of DPPH in the whole temperature range from 273 to - 1.7 K have Gaussian shape Lorentzian shape Both None

Explanation / Answer

1) Zavoisky
2) Temperature
3) Both a and b
4) 196 lines
5) 1 ESR line
6) 25 kg
7) +0.122
8) a part
9) 2nI + 1
10) Lorentzian shape

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