問題詳情
47. When the name of a monosaccharide is preceded only by (+), it can be said, correctly, that:
(A) The compound is the a-anomer.
(B) The compound exists in the pyranose form.
(C) The compound is dextrorotatory.
(D) The compound is made from D-(+)-glucose.
(E) The compound is chiral.
參考答案
答案:[無官方正解]
難度:計算中-1
書單:沒有書單,新增
用户評論
【各選項詳解】評論
當單醣名稱前面僅帶有(+)時,可以正確地說該單醣的比旋光度為正。在糖化學的背景下,比旋光度是化合物光學活性的量度。(+) 符號表示該化合物沿順時針(右手)方向旋轉平面偏振光,這也稱為右旋。