def get_default_value(key):
    """ Gives default values according to the given key """
    default_values = {'coordinates': 2, 'obabel_path': 'obabel',
        'obminimize_path': 'obminimize', 'criteria': 1e-06, 'method': 'cg',
        'hydrogens': False, 'steps': 2500, 'cutoff': False, 'rvdw': 6.0,
        'rele': 10.0, 'frequency': 10}
    return default_values[key]
