def calc_k_neg2(T_K):
    """
    Calculates k2- kinetic constant from Table 1 in Kaufmann and Dreybrodt (2007).

    Parameters
    ----------
    T_K : float
       temperature Kelvin

    Returns
    -------
    k_neg2 : float
       kinetic constant k2-

    Notes
    -----
    Related to the rate of CO2 conversion.
    """
    k_neg2 = 10.**(14.09 - 5308./T_K)
    return k_neg2