Source:http://linkedlifedata.com/resource/pubmed/id/18512689
| Subject | Predicate | Object | Context |
|---|---|---|---|
| pubmed-article:18512689 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:18512689 | lifeskim:mentions | umls-concept:C0699900 | lld:lifeskim |
| pubmed-article:18512689 | lifeskim:mentions | umls-concept:C0243125 | lld:lifeskim |
| pubmed-article:18512689 | lifeskim:mentions | umls-concept:C0598027 | lld:lifeskim |
| pubmed-article:18512689 | pubmed:issue | 21 | lld:pubmed |
| pubmed-article:18512689 | pubmed:dateCreated | 2008-7-17 | lld:pubmed |
| pubmed-article:18512689 | pubmed:abstractText | Treatment of the nido-1-CB8H12 (1) carborane with NaBH4 in THF at ambient temperature led to the isolation of the stable [arachno-5-CB8H13]- (2(-)), which was isolated as Na+[5-CB8H13]-.1.5 THF and PPh4 +[5-CB8H13]- in almost quantitative yield. Compound 2(-) underwent a boron-degradation reaction with concentrated hydrochloric acid to afford the arachno-4-CB7H13 (3) carborane in 70 % yield, whereas reaction between 2(-) and excess phenyl acetylene in refluxing THF gave the [closo-2-CB6H7]- (4-) in 66 % yield. Protonation of the Cs+4(-) salt with concentrated H2SO4 or CF3COOH in CH2Cl2 afforded a new, highly volatile 2-CB6H8 (4) carborane in 95 % yield, the deprotonation of which with Et3N in CH2Cl2 leads quantitatively to Et3NH+[2-CB6H7](-) (Et3NH+4(-)). Both compounds 4- and 4 can be deboronated through treatment with concentrated hydrochloric acid in CH2Cl2 to yield the carbahexaborane nido-2-CB5H9 (5) in 60 % yield. New compounds 2-, 3, and 4 were structurally characterised by the ab initio/GIAO/MP2/NMR method. The method gave superior results to those carried out using GIAO-HF when relating the calculated 11B NMR chemical shifts to experimental data. | lld:pubmed |
| pubmed-article:18512689 | pubmed:language | eng | lld:pubmed |
| pubmed-article:18512689 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:18512689 | pubmed:status | PubMed-not-MEDLINE | lld:pubmed |
| pubmed-article:18512689 | pubmed:issn | 0947-6539 | lld:pubmed |
| pubmed-article:18512689 | pubmed:author | pubmed-author:HolubJosefJ | lld:pubmed |
| pubmed-article:18512689 | pubmed:author | pubmed-author:BakardjievMar... | lld:pubmed |
| pubmed-article:18512689 | pubmed:author | pubmed-author:StíbrBohumilB | lld:pubmed |
| pubmed-article:18512689 | pubmed:author | pubmed-author:HnykDrahomírD | lld:pubmed |
| pubmed-article:18512689 | pubmed:issnType | lld:pubmed | |
| pubmed-article:18512689 | pubmed:volume | 14 | lld:pubmed |
| pubmed-article:18512689 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:18512689 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:18512689 | pubmed:pagination | 6529-33 | lld:pubmed |
| pubmed-article:18512689 | pubmed:dateRevised | 2009-8-4 | lld:pubmed |
| pubmed-article:18512689 | pubmed:year | 2008 | lld:pubmed |
| pubmed-article:18512689 | pubmed:articleTitle | Reductive degradation of nido-1-CB8H12 into smaller-cage carborane systems via new monocarbaboranes [arachno-5-CB8H13](-) and closo-2-CB6H8. | lld:pubmed |
| pubmed-article:18512689 | pubmed:affiliation | Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, ReZ, The Czech Republic. | lld:pubmed |
| pubmed-article:18512689 | pubmed:publicationType | Journal Article | lld:pubmed |