In addition, a small amount of the disubstituted compound (CO) 3 Cr(CNCF 3 ) (CNCH 3 ) 2 ( 6 ) is obtained, which according to its spectroscopic data contains the CNCF 3 ligand and one CNCH 3 ligand in trans position. In the case of 7 , the trans isomer is the only product ...
【题目】醋酸亚铬水合物[Cr(CH3CO0)2]2-2H2O是一种氧气吸收剂,为红棕色晶体,易被氧化,微溶于乙醇,不溶于水和乙醚(乙醚与水不互溶,是易挥发的有机溶剂)。其制备装置及步骤如下:9mol-LK盐酸K水足量去氧的醋酸钠溶液甲丙①检查装置气密性后,往三颈烧瓶中依次加入过量锌粒、适量CrCl3溶液。②关闭K2打...
The photochemistry of (η6-2,6-X2C5H3N)Cr(CO)3 was investigated both in low-temperature matrices (X = H or (CH3)3Si) and in room-temperature solution (X = H, CH3, or (CH3)3 Si). Room-temperature photolysis (λexc > 410 nm) in CO-saturated methanol or acetonitril...
The coordinating properties of the dithiaphospholane ligands R PSCH 2CH 2S and R PS( o-C 6H 4)S (R = CH 3, CF 3) have been studied by synthesis and spectroscopic investigations (IR, NMR, MS) of their chromium complexes Cr(CO) 5L ( 1-4) and cis-Cr(CO) 4L 2 ( 5-8). ...
【题目】二价铬不稳定,极易被氧化。醋酸亚铬水合物[Cr(CH3CO0)2H2O,是一种深红色晶体,微溶于乙醇,不溶于冷水和乙醚。实验室以锌粒、CrCl3溶液、醋酸钠溶液和
The sodium salts Na2[{(CO)5M}2EX2] (M = Cr, Mo, W; E = Ge, Sn, Pb; X = Cl, I, OOCCH3) react with 2,2′-bipyridine (bipy) to form neutral compounds [{(CO)5M}2E(bipy)] (E = Sn: 1a–1c; E = Ge: 3a; E = Pb: 4). 1,10-Phenanthroline (phen) analogues of...
The cuban-like diamagnetic clusters (C 5Me 5) 2M 2(C 5H 5) 2M′ 2S 4 (M, M′ = Cr, Mo) and (C 5Me 5) 4Cr 4S 4 can be synthesized by photolysing (C 5Me 5) 2Mo 2S 4 or (C 5Me 5) 2Cr 2S 5 together with [C 5H 5(CO) 2M′] 2 (M′ = Cr, Mo) or...
答案对的,原子量大的优先,一级原子相同的情况下比较二级原子,双键相当于连了两个相同的原子.不过命名的时候还要先搞清楚官能团的顺序,再看取代基的顺序
求验证这化学基团优先次序对否。-I>-Br>-Cl>SO3H>-SH>-F>-00CR>-OR>-OH>-NO2>-NR2>-NHR>-NH2>-NH2>-CCl3>-COOH>-CONH>-CHO>-CH2OH>-C三N>-C6H5>-C三CH>-C(CH3)3>-CH2二CH2>-CH(CH3)2>-CH2CH2CH3>-CH2CH3>-CH3>-D>-H ...
求验证这化学基团优先次序对否。-I>-Br>-Cl>SO3H>-SH>-F>-00CR>-OR>-OH>-NO2>-NR2>-NHR>-NH2>-NH2>-CCl3>-COOH>-CONH>-CHO>-CH2OH>-C三N>-C6H5>-C三CH>-C(CH3)3>-CH2二CH2>-CH(CH3)2>-CH2CH2CH3>-CH2CH3>-CH3>-D>-H ...