We synthesized systems with NH·N N·HN hydrogen bonds by the reaction of five NH acids with the phosphazene (P Et) base and studied them by FT-IR spectroscopy. The intensity of the observed IR continua caused by the NH·N N·HN hydrogen bonds is comparable with all systems. Thus, the...
It is shown that the band at 3318 cm 1 of the antisymmetric stretching vibration of the NH bonds is the most convenient for experimental detection of the less stable tautomer of chlorin by IR spectroscopy. A nonlocal character of the changes in the force constants and a consistent behavior ...
The difference in the NH bond strengths in the (1)L(a) and (1)L(b) state of 7-azaindole is examined with the fluorescence-detected IR-dip spectroscopy. It has been found that the NH stretch fundamental (3456 cm(-1)) measured by probing the vibronic band at 280 cm(-1) above the...
Synthesis, crystal structure, and solid-state NMR spectroscopy of a new open-framework aluminophosphate (NH(4))(2)Al(4)(PO(4))(4)(HPO(4))xH(2)O. A new three-dimensional open-framework aluminophosphate (NH(4))(2)Al(4)(PO(4))(4)(HPO(4)).H(2)O (denoted AlPO-CJ19) with an...
In the C(O)NHP(O) fragment of (I)-(III), the P-N bond is longer and the O-P-N angle is contracted compared with the other two P-N bonds and the O-P-N angles in the molecules. These effects are also seen in analogous compounds deposited in the CSD. Compounds with [...
Infrared photodepletion and two-colour infrared-ultraviolet REMPI spectroscopy has been undertaken on neutral Li(NH$_2$Me)$_{\it n}$ and Li(NHMe$_2$)$_{\it n}$ clusters in the 3 $\mu$m region. REMPI has been successfully employed for small clusters ({\it n} = 1-3), whereas ...
Using electron energy loss spectroscopy, X-ray photoelectronic spectroscopy, and ellipsometry measurements, a large number of Si-Si bonds at the Si[sub 3]N... Gritsenko,V.,A.,... - 《Applied Physics Letters》 被引量: 13发表: 1998年 Decomposition of ethane and its reaction w...
The crystal structure is a packing of dimeric complex rhodium cations [Rh(μ-OH)(μ-CO)(NH)], nitrate anions, and crystallization water molecules joined by a system of hydrogen bonds. The compound has been investigated with IR spectroscopy and powder X-ray diffraction...
andRaman 2.2.5红外和拉曼光谱(IR Spectroscopy) 氨基硼烷的振动和转动模式以及氘同位素拓扑,已通过红外和拉曼光谱被广 泛研究。第一次的拉曼光谱研究测定了氨基硼烷类化合物的伸缩振动的频率。同 时报道出来了一系列相关的B-N键伸缩振动频率‘92-94],如下表2.2: 表2.2 氨基硼烷及其氘代衍生物的BN键伸缩振动频率...
Insitu IR spectroscopy shows that the fully labelled compound [(≡ SiO ) 2 Ta(ND)(ND 2 )], 2-d , can be obtained by moderate heating (60°C, 3h) under D 2 atmosphere (550torr, 300eq. with respect to Ta), and that the exchange is reversible. The observed stretching and bending...