CRYSTAL-STRUCTURES OF THE IODIZED CLOSO-H EXABORATES TRANS-(PH4P)(2)[B6H4I2], MER-(PH4P)(2)[B6H3I3]CENTER-DOT-2CH(2)CL(2), TRANS-(PH4P)(2)[B6H2I4]CENTER-DOT-2CH(3)CN AND (CH2PY2)[B6HI5]

X-ray structure determinations have been performed on single crystals of trans-(Ph4P)(2) [B6H4I2] (1) (triclinic, space group P (1) over bar , a = 9.9680(12), b = 10.9690(11), c = 11.0470(14) Angstrom, alpha = 8 8.167(9), beta = 80.466(12), gamma = 68.839(11)degrees, Z = 1), mer-(P h4P)(2)[B6H3I3] . 2 CH2Cl2 (2) (triclinic. space group P (1) over bar, a = 11.8694(11), b = 15.1699(13), c = 17.051(2) Angstrom, alpha = 75. 118(9), beta = 71.953(10), gamma = 69.331(8)degrees, Z = 2), trans-(Ph 4P)(2)[B6H2I4] . 2 CH3CN (3) (monoclinic, space group P2(1)/n, a = 14. 9665(10), b = 7.6783(10), c = 23.385(3) Angstrom, beta = 95.78(9)degre es, Z = 2), and (CH2Py2)[B6HI5] (4) (orthorhombic, space group Pnma, a = 13.660(2), b = 11.8711(13), c = 13.839(2) Angstrom, Z = 4), The B-6 octahedra are compressed in the direction of the B-I bonds, resulting in shortened diagonal B ... B distances with average values of the gr oups I-B ... B-I =11.37 and I-B ... B-H = 2.43 Angstrom as compared wi th H-B ... B-H = 2.49 Angstrom.