**CHEM455 - NMR Assignment**

**Part 1: Determination of the proton 90 degree pulse:**

**Excel spreadsheet for Pulsewidth increment: 2 microseconds**

**Excel spreadsheet for Pulsewidth increment: 5 microseconds
**

**
Formula used in Excel: I = I _{0} * [sin (PW * pi / PW_{180}) * exp (- PW / P_{decay})]
**

with: | PW | = pulse width (in microseconds) | |

pi / PW_{180} | = conversion factor: microseconds -> radians | ||

P_{decay} | = decay of pulse power for long pulses |

**Part 2: T _{1} relaxation: Use I = I_{0} * (A - (2 * exp (- D2 / T_{1})))**

**Excel spreadsheet for T1 Calculation**

**Part 3: T _{2} relaxation: Use I = I_{0} * exp (-2 * D2 / T_{2})**

**Excel spreadsheet for T2 Calculation**

**Part 4: Nuclear Overhauser Enhancement (NOE / NOESY)**

Return to the NMR homepage
Return to the Chemistry Department