Description:
SUPPLEMENTARY MATERIALS SUMMARY :
Supplementary crystallographic data for the compounds mentioned in the article can be obtained from the Cambridge Crystallographic Data Centre (CCDC) free of charge. The CCDC numbers for the supplementary crystallographic data are as follows: CCDC no: 2325385 (BB2), CCDC no: 232586 (BB4), and CCDC no: 232587 (BB6).
To access the supplementary crystallographic data, please visit the Cambridge Crystallographic Data Centre's website at http://www.ccdc.cam.ac.uk/data request/cif.