中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | Amino-di-tert-butylphosphan | 17858-28-5 | C8H20NP | 161.227 |
Both bis(diisopropylphosphino)amine and bis(di-t-butylphosphino)amine react with CS2 to give bright red zwitterionic adducts of the form R2P(CS2)NP(R2)H (R = iPr or tBu). The P–H tautomer is the exclusive species present in solution, and there is no evidence of CS2 lability. The tautomeric hydrogen can undergo exchange with deuterium in protic solvents such as CD3OD. The products were characterized by single-crystal X-ray diffraction, IR and multinuclear (1H, 2H, 13C, 31P) NMR spectroscopies.
The bis(dialkylphosphino)amines R2PNHPR2 react with elemental halogens X2 in dichloromethane to produce cationic products of the general form [(R)2P(X)-N-(R)2P(X)]+ (R = i-Pr, Ph, and t-Bu; X = Cl, Br, and I). All of the nine possible products have been isolated and characterized using X-ray diffraction. The dichloro compounds crystallize as [HCl2]− salts, while the dibromo and diiodo products have been isolated as trihalides, [X3]−. A number of these compounds have been shown to react further with methanol to produce salts containing [(R)2P(OCH3)N(R)2P(OCH3)]+ cations, some of which have also been characterized using X-ray crystallography. The conversion of [(Ph)2P(I)-N-(Ph)2P(I)][I3] to [(Ph)2P(OCH3)-N-(Ph)2P(OCH3)][I3] was monitored using 31P NMR spectroscopy that revealed a stepwise reaction of the former compound with methanol. The results are discussed within the context of coupled reactions; this is then used to rationalize a mechanism for the formation of a rare catenated bismuth compound we reported previously. We suggest that the formation of the weak Bi–Bi bonds is offset by a coupled or a connected reaction mechanism , involving an irreversible reaction forming strong P–OR bonds in another of the isolated products.