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A Direct Route to Halogenated Arsaborane Clusters: Crystal Structure of 3,4,5,6‐Tetrachloro‐1,2‐diarsa‐ closo ‐hexaborane(4)
Author(s) -
Schäfer Ronald,
Einholz Wolfgang,
Keller Willi,
Eulenberger Günther,
Haubold Wolfgang
Publication year - 1995
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19951280713
Subject(s) - chemistry , octahedron , crystallography , molar ratio , crystal structure , arsenic , crystal (programming language) , catalysis , organic chemistry , computer science , programming language
Copyrolysis of B 2 Cl 4 and AsCl 3 at 330°C leads to the formation of closo ‐1,2‐As 2 B 4 Cl 4 ( 1 ) and further products the mass spectral evidence of which suggests that they are perchlorinated arsaboranes As 2 B 5 Cl 5 , As 4 B 8 Cl 6 , and As 2 B 10 Cl 10 . The pyrolysis temperature and the molar ratio of the reactants exert an essential influence on the type and distribution of the products. At temperatures above 400°C and higher B 2 Cl 4 /AsCl 3 ratios the formation of As 2 B 10 Cl 10 is preferred to that of smaller arsaboranes. A single‐crystal X‐ray study of 1 confirmed that, consistent with its 14‐skeletal electron count, the arsaborane adopts a slightly distorted octahedral structure with the arsenic atoms in adjacent cis positions.