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Date: 14-8-2017
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Date: 9-5-2016
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Date: 18-9-2017
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CYCLIC OLIGOMERS OF BUTADIENE
Butadiene could be oligomerized to cyclic dienes and trienes using certain transition metal complexes. Commercially, a mixture of TiCl4 and Al2Cl3(C2H5)3 is used that gives predominantly cis, trans, trans- 1,5,9-cyclododecatriene along with approximately 5% of the dimer 1,5-cyclooctadiene :
1,5,9-Cyclododecatriene is a precursor for dodecane-dioic acid through a hydrogenation step followed by oxidation. The diacid is a monomer for the production of nylon 6/12. Cyclododecane from cyclododecatriene may also be converted to the C12 lactam, which is polymerized to nylon 12.
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لخفض ضغط الدم.. دراسة تحدد "تمارين مهمة"
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طال انتظارها.. ميزة جديدة من "واتساب" تعزز الخصوصية
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مشاتل الكفيل تزيّن مجمّع أبي الفضل العبّاس (عليه السلام) بالورد استعدادًا لحفل التخرج المركزي
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