01747nas a2200169   4500008004100000022001400041245006600055210006500121260007100186300001400257490000600271520111100277100002801388700002801416700003301444856010001477       2007                        eng d  a1528-748300aSupramolecular architecture in some 4-halophenylboronic acids0 aSupramolecular architecture in some 4halophenylboronic acids  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcOCT  a1958-19630 v73 a<p>Crystal structures of 4-chloro- and 4-bromophenylboronic acids (1 and 2) and hydrates of 2 and 4-iodophenylboronic acid in two different forms (2a, 3a, and 3b), which were characterized by single-crystal X-ray diffraction methods, are reported. In structures I and 2, -B(OH)2 forms a syn-anti conformation, but it exists in syn-syn as well as anti-anti conformations in the hydrated structures 2a, 3a, and 3b. In all the structures, the molecules are held together by O-H center dot center dot center dot O interactions formed by -B(OH)2 groups. The C-H center dot center dot center dot X (X = Cl, Br, and I) interactions play an important role in crystal packing. In 2, Br center dot center dot center dot Br interactions are also observed. Interestingly, all the three hydrates form similar types of three-dimensional structures with the formation of channels, which are occupied by water molecules. The two hydrates of 4-iodophenylboronic acid (3a and 3b) are distinguishable on the basis of O center dot center dot center dot O short contacts, with an identical host lattice of the boronic acid.</p>1 aShimpi, Manishkumar, R.1 aSeethaLekshmi, Nanappan1 aPedireddi, Venkateswara, Rao  uhttps://library.ncl.res.in/content/supramolecular-architecture-some-4-halophenylboronic-acids-0