In 1906 James Dewar and H. O. Jones were able to determine the structure of di-iron nonacarbonyl, which is produced from iron pentacarbonyl by the action of sunlight.
Pada tahun 1906 James Dewar dan H. O. Jones mampu menentukan struktur di-besi nonakarbonil, yang dihasilkan dari besi pentakarbonil oleh aksi sinar matahari.