Naslov
Crystal Structure Study of the Chiral Spirodinaphthopyrans

Autori
Hergold-Brundić, Antonija ; Nagl, Ante ; Mintas, Mladen ; Lončar-Tomašković, Linda ; Mannschreck, Albrecht ; Lorentz, Klaus

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Fifth Slovenian-Croation Crystallographic Meeting / - , 1996, 28-28

Skup
Fifth Slovenian-Croation Crystallographic Meeting

Mjesto i datum
Zreče, Slovenija, 13.06.1996. - 15.06.1996

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Chiral Spirodinaphthopyrans

Sažetak
Spiropyrans have been investigated largely because of their thermo- and photochromic behaviour and aplication in display and storage of information as well as solar energy conversion. Our interests in chiral 2H-chromenes were related to resultion of their enantiomers and determination of barriers to racemization. This study is conserned with structure determination of the novel diethyl and diphenyl derivatives. Crystal data (A): C_29H_22O_2 ; M_r = 402.47, ortorombic group Ccc2 (No. 37) ; a = 12.635(2), b = 19.761(2), c = 8.429(1) Ĺ, V = 2104.6(5) Ĺ^3 ; D_x = 1.270 g cm^-3 ; Z = 4 ; F(000) = 848 ; MoK_alpha radiation ; mi = 0.78 cm^-1 ; R = 0.047 ; R_w= 0.1288 ; 145 parameters, 1765 reflections with I more or equal 2 sigma(I) used in the refinement. Crystal data (B): C_37H_24O_2 ; M_r = 500.56, monoclinic group P2_1/a (No. 14) ; a = 12.981(2), b = 12.664(2), c = 16.009(2) Ĺ, beta=90.96(1)^o ; V = 2631.4(7) Ĺ^3 ; D_x = 1.264 g cm^-3 ; Z = 4 ; F(000) = 1048 ; MoK_alpha radiation ; mi = 0.77 cm^-1 ; R = 0.057 ; R_w= 0.1687 ; 354 parameters, 2802 reflections with I more or equal 2 sigma(I) used in the refinement.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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