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The reaction of galliumtrichloride and galliumtribomide resp. with 2,6-dimethyl- and 2,4,6-trimethyl- N-trimethylsilyl-trifluoroacetanilide leads to the trifluoracetanilidodihalogenogallanes 1-3. The 2,6,9-trioxa-4,8-diaza-1,5-digalla-bicyclo-[3.3.1]-nonadiene derivatives 1 a-3 a are formed probably as by products. N-Trimethylsilyltrifluoroacetamide reacts with galliumtrichloride to yield the trifluoroacetamido-dichlorogallane 4. N-Trimethylsilyl- N,N′,N′-triorganyl-thioureas react with galliumtrichloride under elimination of chlorotrimethylsilane to give the thio-ureido-gallanes 5 and 6. If N,N′-diorganylureas and N,N′-diorganyl-thio-ureas resp. are reacted with galliumtrichloride and methyl-gallium-dichloride resp., the thio-ureido- and ureido-gallanes 7-9 are obtained by elimination of hydrogenchloride. The compounds are characterized by analysis and spectral data (NMR:H,F; MS; IR). The substances are monomeric in the gas phase, obviously due to internal coordination. [ABSTRACT FROM AUTHOR]

Trimethylsilylacetamide and trimethylsilyltrifluoroacetamide react with halogenodiorganylboranes to monomeric or dimeric amidoboranes depending on the organyl substituents. The compounds were characterized analytically and spectroscopically (NMR:H,F,B; MS; IR). [ABSTRACT FROM AUTHOR]

N-Trimethylsilylamides react with aminohalogenoboranes in nearly quantitative yield to monomeric amido(bis)aminoboranes. From the reaction of N-substituted acylamides with bis(amino)halogenoboranes and dialkoxyhalogenoboranes respectively and triethylamine corresponding amido-bis(amino)-and amido-bis(alkoxy)boranes were obtained in high yields. In certain cases equilibria between monomeric and dimeric forms are observed.H,R, andF.-n.m.r. spectra, mass spectra and characteristic i.r. group frequencies are reported. [ABSTRACT FROM AUTHOR]

N-substituted halogenoacetamides react with halogenoboranes to the title compounds. The corresponding N-substituted halogenoimines result as byproducts. The importance of inductive and steric effects of the substituents is shown by the fact, that certain N-substituted halogenoacetamides react under formation of N-substituted halogenoimines only.H-,B-, andF-NMR spectra, mass spectra and characteristic IR group frequencies are reported. [ABSTRACT FROM AUTHOR]

N-substituted thioamides react with bromo(organyl)boranes under formation of the corresponding thioamidoboranes and HBr. TheB-NMR-spectra as well as the boiling points show, that these compounds are mostly dimeric at room temperature, resp. monomeric in the vapor-phase.H-,B-NMR-spectra and the mass spectra are reported. [ABSTRACT FROM AUTHOR]

Depending upon the electronic behaviour of the substituent R in nitroso compounds R−N=O, either adducts with halogenoborane derivates are formed, or addition of a boron-halogen bond across the N=O double bond can take place. Accordingly N-nitrosoamines form adducts with trichloroborane and organoboranes, while from the reactions of 1,1-dichloronitrosoethane and BCl or BBr dimeric alkylideneiminoxyboranes are obtained under elimination of Cl and Br resp. [ABSTRACT FROM AUTHOR]

Alkylideniminoxy-dimethylboranes are obtained from the corresponding organic oximes and bromo-dimethylborane. Equilibria between the monomeric and dimeric form of the title compounds can be easily followed byH- andB-NMR-spectroscopy. Additional characterisation is given by mass spectrometry, i.r. and analytical data. [ABSTRACT FROM AUTHOR]