1,7-Diaminoundecahydro-closo-dodecaborate was synthesized and characterized
. Crystals are orthorhombic, space group Pna2(1), a = 22.99(1) Angstrom, b
= 10.293(6) Angstrom, c = 9.323(6) Angstrom, V = 2206(2) Angstrom (3), Z =
8. Crystals contain two independent identical neutral molecules 1,7-(NH3)(2
)B12H10 and one water molecule of crystallization. The arrangement of the N
H3 substituents corresponds to the meta isomer.