首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 0 毫秒
1.
On Chalcogenolates. 175. Reaction of Acetamidine with Carbon Disulfide. 4. Synthesis and Characterization of N-Acetimidoyl Dithiocarbamic Acid Orange colored N-acetimidoyl dithiocarbamic acid has been prepared by reaction of the acetimidinium salt in aqueous solution with hydrochloric acid at 0°C. The properties and the thermal behaviour of the acid have been described, its decomposition in solution has been studied at 20°C kinetically.  相似文献   

2.
On Chalcogenolates. 177. Reaction of Acetamidine with Carbon Disulfide. 6. Methylation of N-Acetimidoyl Dithiocarbamates N-Acetimidoyl dithiocarbamates react with methyl iodide to produce the hitherto unknown methyl ester of N-acetimidoyl dithiocarbamic acid AIDTC-CH3 in low yield as well as the S,S′-dimethyl ester of trithiocarbonic acid TTK-(CH3)2, the S-methyl ester of dithiocarbamic acid DTC-CH3, and 2-thiomethyl-4, 6-dimethyl-1, 3, 5-triazine TMMT besides other products (formulae see “Inhaltsübersicht”). The compounds have been characterized by means of diverse methods.  相似文献   

3.
Crystal and Molecular Structure of Tetra-n-butylammonium N-Methyl-N-Thioformyl Dithiocarbamate [N(n-C4H9)4][S2C? N(CH3)? CS? H] crystallizes in the triclinic space group P1 (Z = 2) with cell dimensions (?45°C) a = 9.185(2) Å, b = 10.263(3) Å, c = 13.301(3) Å, α = 101.73(2)°, ß = 99.59(2)°, γ 100.57(2)°. The crystal structure was solved by means of direct methods and refined to a conventional reliability index R = 0.066 (Rω = 0.070). 5945 independent intensities being measured.  相似文献   

4.
5.
On Chalcogenolates. 172. Reaction of Acetamidine with Carbon Disulfide. 1. Synthesis and Properties of N-Acetimidoyl Dithiocarbamates The reaction of acetamidine H2N? C(CH3)?NH with CS2 at ?15°C yields the acetamidinium salt of N-acetimidoyl dithiocarbamic acid. It reacts with hydroxides to form the corresponding N-acetimidoyl dithiocarbamates. The properties and the thermal behaviour of the prepared compounds \documentclass{article}\pagestyle{empty}\begin{document}$ {\rm M}[{\rm S}_2 {\rm C} - {\rm N} = {\rm C}({\rm CH}_{\rm 3} ) - {\rm NH}_2 ]{\rm with M} = [({\rm H}_2 {\rm N})_2 {\rm C} - {\rm CH}_3 ],{\rm Na} \cdot {\rm CH}_3 {\rm OH},{\rm K} \cdot {\rm H}_2 {\rm O},{\rm Rb},{\rm Cs},{\rm Tl},{\rm Pb}/2{\rm and Cd}/2 \cdot {\rm H}_2 {\rm O} $\end{document} have been described. The decomposition in solution has been studied at 20°C kinetically.  相似文献   

6.
7.
On Chalcogenolates. 150. Reaction of Formamide with Carbon Disulfide. 4. Esters of N-Formyl Dithiocarbamic Acid The hitherto unknown esters of N-formyl dithiocarbamic acid H? CO? NH? CS? SR, where R ? CH3 and C2H5, have been characterized by means of diverse spectroscopic methods.  相似文献   

8.
On Chalcogenolates. 158. Reaction of N-Methyl Thioformamide with Carbon Disulfide. 2. Oxidation of N-Methyl N-Thioformyl Dithiocarbamates and S-Methyl Ester of N-Methyl N-Thioformyl Dithiocarbamic Acid The oxidation of N-methyl N-thioformyl dithiocarbamates with iodine forms the hitherto unknown N-methyl-1,2,4-dithiazole-3,5-dithione . The S-methyl ester of N-methyl N-thioformyl dithiocarbamic acid H? CS? NCH3? CS? SCH3 has been prepared by reaction of potassium N-methyl N-thioformyl dithiocarbamate with methyl iodide as well as by reaction of the S-methyl ester of N-methyl N-formyl dithiocarbamic acid with Lawesson reagent. Both compounds have been characterized by means of chemical and diverse spectroscopic methods.  相似文献   

9.
10.
11.
On Chalcogenolates. 205. Reaction of Acetamide with Carbon Disulfide. 2. Esters of N-Acetyl Dithiocarbamic Acid The prepared yellow esters of N-acetyl dithiocarbamic acid H3C? CO? NH? CS? SR with R = CH3, C2H5 have been characterized by means of mass, electron absorption, infrared, and nuclear magnetic resonance spectra.  相似文献   

12.
On Chalcogenolates. 155. Reaction of N-Methyl Formamide with Carbon Disulfide. 2. N-Methyl N-Formyl Dithiocarbamic Acid and Oxidation of N-Methyl N-Formyl Dithiocarbamates The reaction of a solution of K[S2C? NCH3? CO? H] in acetone-d6 with gaseous HCl at ?78°C forms unstable H? CO? NCH3? CS? SH. The existence of this acid in solution has been demonstrated by nuclear magnetic resonance spectra. The oxidation of N-methyl N-formyl dithiocarbamates with iodine yields N,N′-dimethyl N,N′-diformyl thiuram disulfide (H? CO? NCH3? CS? S? )2, which has been characterized by means of diverse spectroscopic methods.  相似文献   

13.
14.
On Chalcogenolates. 111. Studies on Perthiocyanic Acid. 4. Crystal and Molecular Structure of Dimethyl Perthiocyanate (CH3)2C2N2S3 crystallizes with Z = 4 in the monoclinic space group P21/c with cell dimensions a = 7.661(4) Å, b = 11.675(5) Å, c = 9.549(5) Å, β = 116.7(3)·. The crystal and molecular structure has been determined from single X-ray data at 20°C and refined to a conventional R of 0.062. The structure consists of isolated 3,5-bis(methylmercapto)-1,2,4-thiadiazole molecules. The 1,2,4-thiadiazole ring is plane and stabilized by mesomerism.  相似文献   

15.
On Chalcogenolates. 173. Reaction of Acetamidine with Carbon Disulfide. 2. Spectroscopic Characterization of N-Acetimidoyl Dithiocarbamates Different N-acetimidoyl dithiocarbamates [S2C? N = C(CH3)—NH2]? have been characterized by means of electron absorption, infrared, nuclear magnetic resonance (1H and 13C), and Mass spectra.  相似文献   

16.
On Chalcogenolates. 156. Reaction of N-Methyl Formamide with Carbon Disulfide. 3. Alkyl Esters of N-Methyl N-Formyl Dithiocarbamic Acid The hitherto unknown esters of N-methyl N-formyl dithiocarbamic acid H? CO? NCH3? CS? SR, where R = CH3 and C2H5, have been characterized by means of electron absorption, infrared, nuclear magnetic resonance (1H and 13C), and mass spectra.  相似文献   

17.
On Chalcogenolates. 191. Esters of 2-Oxophenyldithioacetic Acid. 2. Crystal and Molecular Structure of the Methyl Ester The title compound C6H5? CO? CS? SCH3 crystallizes with Z = 2 in the triclinic space group P1 with cell dimensions (?60°C) a = 6.236(4) Å, b = 7.972(2) Å, c = 9.589(4) Å, α = 88.42(3)°, β = 75.39(5)°, γ = 81.54(4)°. The structure has been determined from single crystal X-ray data measured at ?60°C and refined to R = 0.085 and Rw = 0.087 for 2307 independent reflections. With nearly 20° the C?O bond is turned out of the plane of the phenyl ring.  相似文献   

18.
Crystal and Molecular Structure of Hexaphenyldiplumbane The crystal and molecular structure of (C6H5)6Pb2 (space group and lattice parameters see above) has been newly determined from 4541 independent reflexes by the heavy atom method; the positions of all atoms, except the H atoms have been refined to give R = 0.053. The unit cell contains two crystallographically independent molecules. (Mean values of bond lengths and angles see above).  相似文献   

19.
20.
Crystal arid Molecular Structure of 2,5-Diiodine-3,4-diethyl-1,2,5-thiadiborolene The title compound crystallizes in the triclinic space group P1 with a = 8.22, b = 8.33, c = 9.745 Å, α = 109.1°, β = 107.1°, γ = 102.9° and two molecules per unit cell. The two molecules are associated by a center of symmetry, forming a four-membered B–S ring, which leads to differently coordinated boron atoms in the thiadiborolene ring. The bond lengths and angles for the boron atoms are similar to those known for trigonally and tetrahedrally bonded boron, respectively. The five-membered ring is nearly planar.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号