메뉴 건너뛰기




Volumn , Issue 2, 2001, Pages 381-386

Syntheses and reactivity of exocyclic unsaturated heterodiborolanes and their diborylhexadiene precursors - Formation of 2-Aza-4,5-dicarba-nido-hexaboranes(6)

Author keywords

Boron; Heteroboranes; Heterocarboranes; Heterocycles; Hydroborations

Indexed keywords

BORON; BORON COMPOUNDS; CYCLIZATION;

EID: 0035144188     PISSN: 14341948     EISSN: None     Source Type: Journal    
DOI: 10.1002/1099-0682(200102)2001:2<381::AID-EJIC381>3.0.CO;2-A     Document Type: Article
Times cited : (9)

References (18)
  • 11
    • 85163231539 scopus 로고    scopus 로고
    • note
    • As simple modeling of such a carborane shows the only possible orientation for an apical duryl group is parallel to the basal B-B and C-C vectors. Even in this position the orthomethyl groups are very close to the isopropyl substituents and the equatorial boron atoms, but these steric interactions do not seem to be severe enough that one would completely exclude the possibility of a duryl group in the apical position. There are only two feasible ways from which such a carborane could originate: by an exchange of two boryl groups in 9a or by a hydroboration with 1,2-diduryldiborane(6). Both reactions would involve intermediates with even shorter duryl-isopropyl contacts, too short for nonbonding interactions. Thus a carborane with a duryl group in an apical position should be stable but in the above discussed cases duryl-isopropyl interactions make the bicyclic intermediates energetically inaccessible so that a carborane cannot form this way.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.