摘要:

The decomposition of propionaldehyde in the presence of various amounts of nitric oxide has been studied in the temperature range 520–560 °C and at propionaldehyde pressures from 30 to 300 mm Hg. The reaction is inhibited by small amounts of nitric oxide, and larger amounts give rise to strong catalysis. The order of the maximally inhibited reaction is 1.5 and the degree of inhibition decreases with an increase of propionaldehyde pressure. In the catalytic region the order of the overall reaction is 1.25 with respect to propionaldehyde, and the relative rate (the ratio of rates in the presence and absence of nitric oxide) is independent of propionaldehyde pressure. The overall rate in the catalytic region can be expressed asthe unit of concentration being mole per cc. A mechanism in which nitric oxide initiates chains by the reaction C2H5CHO + NO → C2H5CO + HNO, propagates them by C2H5NO + C2H5CHO → C2H6 + C2H5CO + NO, and terminates them by C2H5 + C2H5NO → C4H10 + NO and C2H6 + C2H4 + NO and C2H5NO + C2H5NO → C4H10 + 2NO or C2H6 + C2H4 + 2NO is proposed and is shown to be consistent with the results.

ISSN:0008-4042    

DOI:10.1139/v65-031

出版商:NRC Research Press    

年代:1965

数据来源: NRC

摘要:

Hydrolysis equilibrium constants have been determined for a series of compounds of the general form K[LPtCl3], where L is a substituted dialkyl acetylene. The hydrolysis equilibrium position is only slightly affected by the nature of L, indicating that thetransmetal–chlorine and metal–water bonds are similar in character.

ISSN:0008-4042    

DOI:10.1139/v65-032

出版商:NRC Research Press    

年代:1965

数据来源: NRC

摘要:

Thermal cyclization of arylhydrazones in the absence of acid catalyst has been investigated. Indole was not obtained from acetaldehyde phenylhydrazone; aniline, N-ethylaniline, and an unidentified compound were isolated. Phenylhydrazones of cyclohexanone and cyclopentanone and their 2-substituted derivatives were cyclized, often in good yield, to the indole and indolenine; the nature of the substituent markedly influences the ratio of the two products. Gas–liquid chromatographic analysis of the reaction mixture from indolization of two arylhydrazones revealed no crossed products. Nitrophenylhydrazones do not cyclize in good yield, but thermal indolization of some pyridylhydrazones is a good method for the preparation of pyrrolopyridines.

ISSN:0008-4042    

DOI:10.1139/v65-033

出版商:NRC Research Press    

年代:1965

数据来源: NRC

摘要:

not available

ISSN:0008-4042    

DOI:10.1139/v65-034

出版商:NRC Research Press    

年代:1965

数据来源: NRC

摘要:

not available

ISSN:0008-4042    

DOI:10.1139/v65-035

出版商:NRC Research Press    

年代:1965

数据来源: NRC

摘要:

not available

ISSN:0008-4042    

DOI:10.1139/v65-036

出版商:NRC Research Press    

年代:1965

数据来源: NRC

摘要:

not available

ISSN:0008-4042    

DOI:10.1139/v65-037

出版商:NRC Research Press    

年代:1965

数据来源: NRC

摘要:

not available

ISSN:0008-4042    

DOI:10.1139/v65-038

出版商:NRC Research Press    

年代:1965

数据来源: NRC

摘要:

not available

ISSN:0008-4042    

DOI:10.1139/v65-039

出版商:NRC Research Press    

年代:1965

数据来源: NRC

摘要:

not available

ISSN:0008-4042    

DOI:10.1139/v65-040

出版商:NRC Research Press    

年代:1965

数据来源: NRC