24小时热门版块排行榜    

北京石油化工学院2026年研究生招生接收调剂公告
查看: 2732  |  回复: 2

aileenshan

版主

优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!

[求助] 求助一个化合物的旋光度或者旋光度的正负号 已有2人参与

ACS号为  537-46-2   名称: Benzeneethanamine
最好有旋光度的数值,找不到可以是方向,外加溶解的溶剂
回复此楼

» 猜你喜欢

» 本主题相关价值贴推荐,对您同样有帮助:

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

wangyc3

版主

新药研发

优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!

【答案】应助回帖

★ ★ ★ ★ ★ ★ ★
感谢参与,应助指数 +1
aileenshan(星海慧儿代发): 金币+3, 有帮助,多谢回帖交流。 2014-03-11 10:26:20
aileenshan: 金币+4 2014-03-12 18:01:38
Optical Rotation: [a]D25 +14 to +20°
青春无悔
2楼2014-03-10 20:37:35
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

yi_wang

兑换贵宾

roye

优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!

【答案】应助回帖

★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
感谢参与,应助指数 +1
aileenshan(星海慧儿代发): 金币+3, 有帮助,多谢回帖交流。 2014-03-11 10:26:27
aileenshan: 金币+10 2014-03-12 18:01:34
The configuration of title compds. was detd. by the method of asym. transformation.  Following MeCH(NHR)​(CH2)​nPh (I) (R = H) were prepd. by the method of Wallach and Leuckart (n and b.p.​/mm. given)​: 0, 78-​80°​/13; 1, 103°​/13; 2, 110-​15°​/14; and 3, 123-​5°​/19.  The following I (R = CHO) were prepd. by formylation of I (R = H) (n and b.p.​/mm. given)​: 0, 125-​30°​/0.3; 1, 155-​7°​/3; 2, 145-​50°​/3; and 4, - (m. 65-​6°)​.  The redn. of I (R = CHO) with LiAlH4 gave the following I (R = Me) (n and b.p.​/mm. given)​: 0, 80°​/12; 1, 48-​52°​/15; 2, 80°​/1; 3, 122-​4°​/10; and 4, 135-​7°​/18.  I (R = Me, n = 0-​4) (7.5 millimoles) in 5 ml. tetrahydrofuran were treated with 5 millimoles (S)​(+)​-​hydratropic acid ([α]​D 86.6°) and 5 millimoles dicyclohexylcarbodiimide.  The following unreacted optically active I were removed by distn.: (S)​(-​​-​I (R = Me, n = 0)​, [α]​D -​3.5°; (S)​(+)​-​I (R = Me, n = 1)​, [α]​D 0.12°; (S)​(-​​-​I (R = Me, n = 2)​, [α]​D -​0.36°; (S)​(-​​-​I (R = Me, n = 3)​, [α]​D -​0.2°; and (S)​(-​​-​I (R = Me, n = 4)​, [α]​D -​0.16°.  (R)​(+)​-​I (R = H, n = 2)​, [α]​D 3.12°, was converted into (R)​(-​​-​I (R = Ac, n = 2)​, m. 55°, [α]​D -​7.12° (c 0.9, EtOH)​, which upon ozonolysis, H2O2 oxidn., sapon. and benzoylation, gave (R)​(+)​-​N-​benzoyl-​γ-​aminovaleric acid, [α]​D 3.33° (c 0.6, H2O)​, whose abs. configuration was detd. by Balenovic and Cerar.  (+)​-​I (R = H) and (+)​-​I (R = Me) belong to the same steric series as shown by O.R.D. studies.  The O.R.D. curve of S-​(-​​-​I (R = H, n = 0) showed a pos. Cotton effect at 250-​70 mμ superimposed on a strong neg. background curve.  (S)​(+)​-​I (R = H, n = 1) showed the same pos. Cotton effect on an anomalous pos. background.  The O.R.D. curves of (S)​(-​​-​I (R = H, n = 2-​4) were monotone.
CA查到的结果是+0.12 °        Wavlen: 589.3 nm。
哥泡的不是论坛,是寂寞....
3楼2014-03-11 09:20:27
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 aileenshan 的主题更新
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 288求调剂 一志愿哈工大 材料与化工 +18 洛神哥哥 2026-03-31 18/900 2026-03-31 21:55 by haohaichenji
[论文投稿] chinese chemical letters英文版投稿求助 130+4 Yishengeryi 2026-03-30 4/200 2026-03-31 19:52 by babero
[考研] 江苏苏北高校诚邀调剂同学 +3 zzll406 2026-03-31 3/150 2026-03-31 16:54 by 及时行乐fan
[考研] 一志愿南昌大学324求调剂 +6 hanamiko 2026-03-30 6/300 2026-03-31 12:19 by 唐沐儿
[考研] 土木304求调剂 +4 兔突突突, 2026-03-31 5/250 2026-03-31 11:29 by 北风之神.
[考研] 286求调剂 +5 丢掉懒惰 2026-03-27 8/400 2026-03-31 11:27 by Delta2012
[考研] 吉大生物学326分求调剂 +3 sunnyupup 2026-03-31 3/150 2026-03-31 09:28 by longlotian
[考研] 一志愿中海洋320化学工程与技术学硕求调剂 +8 披星河 2026-03-30 8/400 2026-03-31 08:53 by lbsjt
[考研] 福建理工大学材料学院先进合金团队招收考研调剂学生 +3 大华金商都 2026-03-30 4/200 2026-03-31 01:04 by 方英俊602
[考研] 英一数一408,总分284,二战真诚求调剂 +3 12.27 2026-03-30 5/250 2026-03-31 00:47 by 不吃芒果17
[考研] 本科211总分289,08工学真心求调剂 +3 utopiaE 2026-03-30 3/150 2026-03-30 23:42 by ms629
[考研] 332求调剂 +14 032500 2026-03-25 14/700 2026-03-30 20:03 by 无际的草原
[考研] 085601材料工程找调剂 +17 oatmealR 2026-03-29 18/900 2026-03-30 19:21 by Wang200018
[考研] 283求调剂(080500) +14 A child 2026-03-27 14/700 2026-03-30 12:06 by 探123
[考研] 【求调剂】085601材料工程专硕 | 总分272 | +7 脚滑的守法公民 2026-03-27 7/350 2026-03-29 20:21 by dophin1985
[考研] 070305高分子化学与物理 304分求调剂 +12 c297914 2026-03-28 12/600 2026-03-29 16:21 by Serene1974
[考研] 数一英一271专硕(085401)求调剂,可跨 +7 前行必有光 2026-03-28 8/400 2026-03-28 23:22 by 小木虫tim
[考研] 283求调剂 +7 A child 2026-03-28 7/350 2026-03-28 12:05 by zllcz
[考研] 341求调剂 +7 青柠檬1 2026-03-26 7/350 2026-03-27 00:19 by wxiongid
[考研] 网络空间安全0839招调剂 +4 w320357296 2026-03-25 6/300 2026-03-25 17:59 by 255671
信息提示
请填处理意见