Literature DB >> 15018524

An improved method for the synthesis of [closo-B12(OH)12]-2.

Michael J Bayer1, M Frederick Hawthorne.   

Abstract

The dicesium salt of the icosahedral borane anion dodecahydroxy-closo-dodecaborate(2-), closo-Cs(2)B(12)(OH)(12), Cs(2)4, was prepared using an improved synthetic pathway. Heating cesium dodecahydro-closo-dodecaborate, closo-Cs(2)B(12)H(12), Cs(2)1, with 30% hydrogen peroxide added in successive increments at 105-110 degrees C provided Cs(2)4 in 95% yield. Reaction progress was monitored using (1)H-decoupled (11)B NMR while (17)O NMR provides the most reliable way to detect the presence of peroxides in the reaction solution. The reaction may be safely increased in scale to afford Cs(2)4 in multigram quantities.

Entities:  

Year:  2004        PMID： 15018524     DOI： 10.1021/ic030289w

Source DB:  PubMed          Journal:  Inorg Chem        ISSN： 0020-1669            Impact factor:   5.165


  6 in total

1.  Extensions of the icosahedral closomer structure by using azide-alkyne click reactions.

Authors:  Lalit N Goswami; Shatadru Chakravarty; Mark W Lee; Satish S Jalisatgi; M Frederick Hawthorne
Journal:  Angew Chem Int Ed Engl       Date:  2011-04-08       Impact factor: 15.336

2.  A convenient route to diversely substituted icosahedral closomer nanoscaffolds.

Authors:  Satish S Jalisatgi; Vikas S Kulkarni; Betty Tang; Zachary H Houston; Mark W Lee; M Frederick Hawthorne
Journal:  J Am Chem Soc       Date:  2011-07-26       Impact factor: 15.419

3.  Rapid Synthesis of Redox-Active Dodecaborane B12(OR)12 Clusters Under Ambient Conditions.

Authors:  Alex I Wixtrom; Yanwu Shao; Dahee Jung; Charles W Machan; Shaunt N Kevork; Elaine A Qian; Jonathan C Axtell; Saeed I Khan; Clifford P Kubiak; Alexander M Spokoyny
Journal:  Inorg Chem Front       Date:  2016-03-03       Impact factor: 6.569

4.  Synthesis of vertex-differentiated icosahedral closo-boranes: polyfunctional scaffolds for targeted drug delivery.

Authors:  Lalit N Goswami; Zachary H Houston; Saurav J Sarma; Hairong Li; Satish S Jalisatgi; M Frederick Hawthorne
Journal:  J Org Chem       Date:  2012-11-29       Impact factor: 4.354

5.  cRGD peptide-conjugated icosahedral closo-B12(2-) core carrying multiple Gd3+-DOTA chelates for α(v)β3 integrin-targeted tumor imaging (MRI).

Authors:  Lalit N Goswami; Lixin Ma; Quanyu Cai; Saurav J Sarma; Satish S Jalisatgi; M Frederick Hawthorne
Journal:  Inorg Chem       Date:  2013-02-07       Impact factor: 5.165

6.  Discrete nanomolecular polyhedral borane scaffold supporting multiple gadolinium(III) complexes as a high performance MRI contrast agent.

Authors:  Lalit N Goswami; Lixin Ma; Shatadru Chakravarty; Quanyu Cai; Satish S Jalisatgi; M Frederick Hawthorne
Journal:  Inorg Chem       Date:  2012-11-05       Impact factor: 5.165
  6 in total

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