TY - JOUR
T1 - Synthesis and characterization of two cyclic organosiloxanes by multinuclear NMR spectroscopy and X-ray crystallography
AU - Gómez, Elizabeth
AU - Santes, Víctor
AU - De La Luz, Verónica
AU - Farfán, Norberto
N1 - Funding Information:
Financial support from CONACYT is acknowledged. We thank Dr Herbert Höpfl for fruitful discussions.
PY - 1999/11/30
Y1 - 1999/11/30
N2 - 1,3-[2′,6′-Pyridinebis(methyleneoxy)]-1,3-bis(diphenyl) cyclodisiloxane (9) and 2,6-pyridinebis(1,1-diphenylethoxy)diphenylsilane (11) were obtained from 2,6-pyridinediol derivatives with dichlorodiphenylsilane. An N→Si interaction is present in 2,6-pyridinebis(1,1-diphenylethoxy)diphenylsilane, which also shows fluxional behavior. The activation energy of 13.2 kcal mol-1 for 11 was obtained for the intramolecular exchange between the phenyl groups from a variable-temperature 1H-NMR study. The compounds were characterized by 1H-, 13C- and 29Si-NMR and their structures were established by X-ray crystallographic studies.
AB - 1,3-[2′,6′-Pyridinebis(methyleneoxy)]-1,3-bis(diphenyl) cyclodisiloxane (9) and 2,6-pyridinebis(1,1-diphenylethoxy)diphenylsilane (11) were obtained from 2,6-pyridinediol derivatives with dichlorodiphenylsilane. An N→Si interaction is present in 2,6-pyridinebis(1,1-diphenylethoxy)diphenylsilane, which also shows fluxional behavior. The activation energy of 13.2 kcal mol-1 for 11 was obtained for the intramolecular exchange between the phenyl groups from a variable-temperature 1H-NMR study. The compounds were characterized by 1H-, 13C- and 29Si-NMR and their structures were established by X-ray crystallographic studies.
KW - 2,6-Pyridinediol
KW - NMR spectroscopy
KW - Siloxane
KW - X-ray structure
UR - http://www.scopus.com/inward/record.url?scp=0242516111&partnerID=8YFLogxK
U2 - 10.1016/S0022-328X(99)00465-9
DO - 10.1016/S0022-328X(99)00465-9
M3 - Artículo
SN - 0022-328X
VL - 590
SP - 237
EP - 241
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 2
ER -