Inorganic Chemistry, Vol.45, No.4, 1430-1432, 2006
Two new borates containing the first examples of large isolated polyborate anions: Chain [B7O9(OH)(5)](2-) and ring [B14O20(OH)(6)](4-)
Two novel hydrated borates were synthesized under mild solvothermal conditions. One is hydrated rubidium borate, Rb2B7O9(OH)(5), which contains the first example of the isolated chain heptaborate anion, [B7O9(OH)(5)](2-). The other is hydrated diethylenetriamine borate, [(C4H15N3)](2)[B14O20(OH)(6)], which contains the first example of the largest isolated ring tetradecaborate anion, [B14O20(OH)(6)](4-).