7.253 4.164 ISSE Current Data Parameters NAME commercial sample EXPNO PROCNO - F

Question

7.253 4.164 ISSE Current Data Parameters NAME commercial sample EXPNO PROCNO - F2 - Acquisition Parameters 20180404 Time 20.08 INSTRUM spect ????? 5 mm B?? ??-?? PULPROG 32768 SOLVENT CDC13 NS 15 SWH FIDRES AQ RG DE 3591.954 Az 0.109618 Hz 4.5613556 sec 128 139.200 usec 6.00 usec 295.6K 1.00000000 sec 0.00000000 sec 0.01500000 sec TE MCREST MCWRK P1 PLI === CHANNEL [1 mm=smane NUCI 4.50 usec 0.00 de SF01 300.1316510 MHz F2 - Processing parameters 16384 300.1300056 MHz EM SSB 99 0.30 Hz 1.00 ppm 0.00

Explanation / Answer

The PMR spectrum of ferrocene indicates that at delta 4.1 ppm the protons of cyclopentadienyl ring are encountered indicating that all the protons are equivalent & Pi electrons are involved in bonding This is supported by the literature value of cyclopentadienyl protons observed at delta 4.1 ppm .All Pi electrons are involved in bonding with central metal iron.

Other signals observed at delta 1.35, 5.2,& 7.21 ppm may be due to solvent /impurity.9Integration not given).

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