{
 "metadata": {
  "name": ""
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Chapter 19 - Magnetic resonance"
     ]
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example I2 - Pg 467"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#calculate the spin-spin coupling constants\n",
      "#Initialization of variables\n",
      "import math\n",
      "A=5.1 #Hz\n",
      "B=-1.4 #Hz\n",
      "C=3.2 #Hz\n",
      "an1=120*math.pi/180. #radians\n",
      "an2=180*math.pi/180. #radians\n",
      "#calculations\n",
      "j1=A+B*math.cos(an1) + C*math.cos(2*an1)\n",
      "j2=A+B*math.cos(an2) + C*math.cos(2*an2)\n",
      "#results\n",
      "print '%s %d %s' %(\"Spin-spin coupling constant =\",j1,\"Hz\")\n",
      "print '%s %.1f %s' %(\"\\n Spin-spin coupling constant =\",j2,\"Hz\")\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Spin-spin coupling constant = 4 Hz\n",
        "\n",
        " Spin-spin coupling constant = 9.7 Hz\n"
       ]
      }
     ],
     "prompt_number": 1
    }
   ],
   "metadata": {}
  }
 ]
}