نتایج جستجو برای: formyl benzo 12 crown 4ether
تعداد نتایج: 608437 فیلتر نتایج به سال:
چکیده این تحقیق در بخشی از سامان عرفی شوراب چنار بگالی استان لرستان که بلوط ایرانی (quercus brantii lindl.) گونه غالب جنگل های آن است صورت پذیرفت. در مطالعه ی حاضر به منظور بررسی تاثیر عوامل توپوگرافی (ارتفاع از سطح دریا، شیب و جهت زمین) بر فاکتورهای تاج پوشش، مساحت تقریبی 1500 هکتار انتخاب گردید. سپس تعداد 147 قطعه نمونه مستطیلی به ابعاد 20 ×10 متر با استفاده از شبکه آماربرداری منظم - تصادفی ...
Diazahexathia-24-crown-8 (2) has been isolated from the reaction mixture during the preparation of monoazatrithia-12-crown-4 (1). When N-Boc protected bis(2-chloroethyl)amine was employed as a starting material, N-Boc protected monoazatrithia-12-crown-4 (3) and N-Boc protected diazahexathia-24-crown-4 (4) were separated easily. Double-armed diazahexathia-24-crown-8 having two 3',5'-dichlorobenz...
In the structure of the title complex, [Cu(C(8)H(4)O(4))(C(12)H(8)N(2))(H(2)O)]·CH(4)O, the Cu(II) ion is penta-coordinated in a tetra-gonal-pyramidal geometry, with two O atoms of the 3-formyl-2-oxidobenzoate (3-formyl-salicylate) anion and two N atoms of 1,10-phenanthroline occupying the basal plane, and a water O atom located at the apical site. The structure displays O-H⋯O hydrogen bonding.
A new benzo[c]phenanthridine, oxynorchelerythrine (1), and two new benzenoid derivatives, methyl 4-(2-hydroxy-4-methoxy-3-methyl-4-oxobutoxy)benzoate (2) and (E)-methyl 4-(4-((Z)-3-methoxy-3-oxoprop-1-enyl)phenoxy)-2-methylbut-2-enoate (3), have been isolated from the twigs of Zanthoxylum ailanthoides, together with 11 known compounds (4-14). The structures of these new compounds were determine...
polynuclear Aromatic Bydromrbons As criteria for the presence of polynuclear aromatic hydrocarbons in tobacco smoke, the list of J. W. Cook (m) has been widely accepted by tobacco chemists. The Surgeon General’s 1964 Report and Cook’s paper are in agreement with respect to the presence of benzo(a)pyrene (3 : 4benzopyrene) , dibenz (a,h) -anthracene (12 : 5,6-dibenzanthrac) : benzo(c) phenanthre...
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