答:链节为—CH3CH—CH2—,其分子量:m = 312.011+61.008=42.081 g/mol4.5 (a) 计算聚苯乙烯链节的分子量答:链节为 CHC6H5CH2,分子量:m = 812.011+81.008=104.152(b) 计算重均聚合度为25000的聚苯乙烯的重均分子量答: (M_w)(M_w)= 25000104.152 g/mol = 2603800 g/mol4.6 下表列出了聚丙烯的分子...
TIM_OCInitStructure.TIM_Pulse = ch2_ccp;// 通道2的比较值TIM_OC2Init( TIM2, &TIM_OCInitStructure ); TIM_OC2PreloadConfig( TIM2, TIM_OCPreload_Disable ); TIM_OCInitStructure.TIM_Pulse = ch3_ccp;// 通道3的比较值TIM_OC3Init( TIM2, &TIM_OCInitStructure ); TIM_OC3PreloadConfig( TIM2, TIM...
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE); DMA_StructInit(&DMA_InitStructure);/*Note:DAC1--->DMA1.CH3 DAC2--->DMA1.CH4*/DMA_InitStructure.DMA_PeripheralBaseAddr= (u32)&(DAC->R12BDHR1); DMA_InitStructure.DMA_MemoryBaseAddr= (u32)&dacbuff16bit; DMA_InitStructure.DMA_DIR=DMA...
ChemInform Abstract: The Ethyl Dication (CH3CH·2+ 2): Classical (Open) or Nonclassical (Bridged)?structure (organic substancesNo abstract is available for this article.doi:10.1002/chin.198734069WONG, M. W.BAKER, J.NOBES, R. H.RADOM, L....
h.ear 系列 H910N、Extra Bass 系列 XB910N 以及旗舰 1000X 系列了。再往下则是 CH5XX / CH3XX ...
只有1个异构化为了烯醇（原谅我不会命名），而剩余99个丙酮分子；或者收，每100个CH2＝C(CH3)－OH...
Provied information about Al(η2-CH3)(C5H3N3)2)2(C6H3(CH(CH3)2)2(Molecular Formula: C36H51AlN3+, CAS Registry Number:942591-58-4 ) ,Boiling Point,Melting Point,Flash Point,Density, Molecular Structure,Risk Codes,Synthesis Route at guidechem
How to find lone pairs in a Lewis structure Explain sigma bond and pi bond, by using valence bond theory. Draw the correct Lewis dot structure from the given shorthand notation below: [He]2s^2 2p^3. What is the Lewis dot structure for CH3Cl? A common mistake is to draw GeF...
Racemic 1, Ph3C+BF4- (1 equiv), and the N,N'-dimethyl 1,2-diamine HN(CH2CH3)CH2CH2(H3CCH2)NH (1 equiv) give [(η5-C5H5)Re(NO)(PPh3)(CH2NH(CH2CH3)CH2CH2NH(CH2CH3))]+BF4-, and the crystal structure of the SReSN,RReRN diastereomer is determined. The ReCH2N conformations ...
Provied information about 1-(CH(CHCCl2)(OC2H5))-2-(CH3)-1.2-C2B10H10(Molecular Formula: C8H20B10Cl2O, CAS Registry Number:24492-05-5 ) ,Boiling Point,Melting Point,Flash Point,Density, Molecular Structure,Risk Codes,Synthesis Route at guidechem