A Cage Molecule with a Cubanoid P₄B₄ Framework: tBu₄P₄Ph₄B₄O₁₂—A Structural Analogue of the Isovalence Electronic Organosilasesquioxanes R₈Si₈O₁₂

Abstract

triclinic, PT (no. 2), a =15.647(2), h = 22.325(3), c =14.852(4) A, a = 94.91(2), B = 90.17(2), y = 83.53(1)", V = 5136(1) A', Z = 4, pCllcd = 1.463 gcm-', T = 296 K. Instrumentation and software were as noted for 1. The structure was solved by Patterson methods and expanded by using fourier techniques. Hydrogen atoms were included but not refined. Of 18771 data collected (maximum 26 = SO", Mo,., p = 22.52 cm-'), 18033 were unique. The final residuals for 1082 parameters refined against 8078 unique data with I > 30(I) were R = 0.053 and R, = 0.054. Crystallographic data (excluding structure factors) for the structures reported in this paper have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication no. CCDC-100024 Copies of the data can be obtained free ofcharge on application to The Director. CCDC, 12 Union Road, Cambridge CB2 1EZ. UK (fax: Int. code + (1 223) 336-033; e-maii deposit@,chemcrys.cam.ac.uk).

Gallophosphonates Containing Alkali Metal Ions. 2.1 Synthesis and Structure of Gallophosphonates Incorporating Na+ and K+ Ions

“…[4][5][6] In the last few years, there have been a few attempts to prepare smaller building units of boro-, alumino-, and gallophosphonates from easily available starting materials. [7][8][9][10][11][12][13][14] In particular, the work carried out on group 13 phosphonates by us 1,7-10 and others [11][12][13][14] has resulted in the synthesis of soluble molecular compounds which have (1) a double-four-ring (D4R or 4-4) type of core structure with a M 4 O 12 P 4 central unit (A), 7,8 (2) a double-sixring (D6R or 6-6) type of core structure with a M 6 O 18 P 6 central unit (B), 10 or (3) a stable eight-membered M 2 O 4 P 2 ring structure (C) 12,13 The study of zeolites and conductive polymers which contain metal ions trapped inside their channels is one of the most intriguing developments in the area of materials science. 15,16 Electronically connected and as well as isolated conductive hyperlattices need appropriate host materials, and zeolites have been found to provide novel host lattices for a variety of metal ions and clusters.…”

Synthesis and Characterization of Dimeric, Trimeric, and Tetrameric Gallophosphonates and Gallophosphates

“…20 Roesky has similarly reported several cubic phosphonates of the group 13 elements, [14][15][16][17] including the first tetrameric phosphonates of indium. 17 In addition, the Barron group and Kuchen and co-workers have reported a cyclic gallophosphonate 21 and a cubic borophosphonate, 22 respectively.…”

Synthesis of N-Alkyl/Aryl-α/β-Aminoalkylphosphonic Acids from Organodichloroboranes and α/β-Azidoalkylphosphonates via Polyborophosphonates

“…Methanolysis of the reaction mixture gave α -azidomethylphosphonic acid ( 3 ) and cyclohexylboronic acid ( 26 ). Thus, reaction of 1 with 1 equiv of 7 does not result in the reductive alkylation of the azido group but instead gives a polymer 25 , similar to those recently synthesized either by reaction of trialkylboranes with phosphonic acids 14 or by treatment of silyl esters of phosphonic acids with alkyldichloroboranes 3 …”