Methyltriisopropoxytitanium is the product of the reaction of titanium tetraisopropoxide in ether and of titanium tetrachloride. Methyllithium in ether is then added to the cooled reactants to produce the final product, Methyltriiopropoxytitanium. The IUPAC name for this final product is methyltitanium triisopropoxide. The newly formed carbon-carbon bonds is the methyl group located on the titanium ion.
The reaction scheme for this reaction is listed below for A. :
1In a reaction involving an organolithium reagent the organometallic compound has a bond between a carbon and a lithium atom. Since lithium is very electronegative, the charge of the overall bond is placed on the carbon atom which creates a carbanion. For this reaction, A, the only step of the reaction involves the organolithium reagent acting on the titanium atom and forming the newly bonded Ti-C bond. The first reactant for the reaction is an organotitanium compound. This product of Methyltriiospropoxytitanium is extremely flammable liquid and vapor and can cause severe eye and skin irritation. The target organs for this compound are the respiratory system and eyes. This overall reaction of Methyltriisopropoxytitanium involves an organolithium reagent which alters the overall product. 2
Source
1. "Organic Syntheses Prep." Organic Syntheses Website. Web. 03 Apr. 2011. http://orgsyn.org/orgsyn/prep.asp?prep=v81p0014.
2. MSDS Methyltitanium(IV) Triisopropoxide, 1M Solution in THF CAS 18006-13-8 MSDS Methyltris(isopropoxy)titanium(IV)." MSDS & Custom Synthesis Organic Synthesis Bio-Synthesis Suppliers. HBCChem. Web. 03 Apr. 2011. http://www.chemcas.org/drug/analytical/cas/18006-13-8.asp.
Looks like you answered all the parts of the question and also was able to go in depth on the dicussion of the organolithium. It shows that you have a good understanding of the reaction that is takign place as you describe how the organometallic molecule reacts with the compound and is able to form the new product with the newly attached carbon-carbon bonds.
ReplyDeleteIt was also beneficial to read the introduction giving an insight to the organolithium and then also including some characteristics about the molecule. Overall, it was a good presentation and shows the qualities of the rubric needed to complete the assignment.