1. Department of Chemistry and Biochemistry Utah State University 0300 Old Main Hill 84322-0300 Logan UT USA
2. Theoretical Division Los Alamos National Laboratory 87545 Los Alamos NM USA
3. Tianjin Key Lab of Rare Earth Materials and Applications State Key Laboratory of Elemento-Organic Chemistry School of Materials Science and Engineering Nankai University 300350 Tianjin China
4. Grupo de Química Inorgánica y Materiales Moleculares Facultad de Ingeniería Universidad Autonoma de Chile El Llano Subercaseaux 2801 Santiago Chile