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C 3 H 4 Si Species: Generation and Matrix‐Spectroscopic Identification of Some Silacyclobutadiene Isomers
Author(s) -
Maier Günther,
Reisenauer Hans Peter,
Jung Jörg,
Pacl Harald,
Egenolf Heiko
Publication year - 1998
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/(sici)1099-0690(199807)1998:7<1297::aid-ejoc1297>3.0.co;2-n
Subject(s) - chemistry , identification (biology) , computational chemistry , matrix (chemical analysis) , stereochemistry , combinatorial chemistry , botany , chromatography , biology
Flash pyrolyses of four suitable precursors – namely 1,1,1‐trimethyl‐2‐propargyldisilane ( 32 ), its allenyl ( 34 ) and propynyl isomer ( 35 ), as well as 2‐ethynyl‐1,1,1,2‐tetramethyldisilane ( 31 ) – lead to the formation of three C 3 H 4 Si species ( 7 , 11 , and 15 ). By examination of their photochemistry five additional compounds of the same composition ( 12 , 13 , 14 , 17 , and 18 ) were identified. Except ethynylsilaethene ( 18) , all compounds observed are silylenes. Their identification is based on the comparison of the experimental and calculated (BLYP‐6‐31G*) IR spectra. Silacyclobutadiene ( 4 ) or silatetrahedrane ( 25 ) could not be detected.