Which of the following is the most stable conformation of cis-1-(tert-butyl)-2-methylcyclohexane? Bul But Bul Me Me Me (b) But But But Me Me Me (d) ( e)
1. PIOVE ATT(BUL) = (An B) u (AnC). 8. Prove A c B if and only if An B = A. AD
whats the major product of these two reactions? 1) OsO4 (cat), NMO 2) NaHSO3, H20 PPh3 CI Rus Ph PPh3
NiCl2·2H2O + 2 PPh3 + 2 HC(OC2H5)3 → [NiCl2(PPh3)2] + 2 HC(O)OC2H5 + 4 C2H5OH and NiCl2·2H2O + dppe + 2 HC(OC2H5)3 → [NiCl2(dppe)] + 2 HC(O)OC2H5 + 4 C2H5OH where Ph = C6H5 and dppe = Ph2PCH2CH2PPh2. MW of [NiCl2(PPh3)2]= 654.2 g/mol MW of NiCl2·2H2O= 165.6 g/mol MW of PPh3= 262.3 g/mol Mw of Triethyl orthoformate HC(OC2H5)3 = 148.2 g/mol density of triethyl orthoformate HC(OC2H5)3 = 0.891 g/ mL If 0.186 g of NiCl2:2H20 reacts with 0.577 g of PPhz...
3. Wilkinson developed two catalysts, RhCl(PPh3)3 and RhH(CO)(PPh3)3. Which would you choose to catalyze the isomerization of cis-MeCH=CHMe to the trans isomer without using any other chemical other than a solvent? Show a proposed mechanism to accomplish this desired isomerization. Wilkinson developed two catalysts, RhCl(PPh3)3 and RhH(CO (PPh3)3. Which would you choose to catalyze the isomerization of cis-MeCH-CHMe to the trans isomer without using any other chemical other than a solvent? Show a proposed mechanism to accomplish this desired isomerization....
? (PPh3)3Rhci E F G
Which are the best reagents for the following transformation? OCH3 O 1. DIBAL 2. (CH3)2CHCH=PPh3 O 1. (CH3)2CHMgBr 2. H30+ O 1. LiAlH4 2. TosCl, pyridine 3. (CH3)2CHCH Br O 1. NaOH, heat 2. (CH3)2CHCH=PPh3
Calculate the molecular weight of CuBr(PPh3)3
Q2: Describe frequency response of a system with input x(t)=) ,-b|t| + bul and output y(t)=1+1 1 [10] Given, e-alt/ 2a a’ +02 a>0 1 → e-alal a> 0 a +t e-ar? 40 a> 0
Mn(CO)6 can react with PPh3 under different condition to make 2 isomers (cis and trans). Answer the following:1. 1. Mn(CO)6 was reacted with triphenylphosphine (PPh3) and NaBH4, absolute ethanol to produce Mn(CO)4(PPh3)2. What is the balanced reaction for this? 2. Mn(CO)6 was reacted with triphenylphosphine (PPh3) and NaBH4, 1-butanol to produce Mn(CO)4(PPh3)2. What is the balanced reaction for this? 3. How can we tell which isomer is produced from each equation by the IR spectrum of the product? 4. Mn(CO)6...