Granted Patent B2

US 7,754,101 · App. 12/274,422 · Granted Jul 13, 2010

Abstract

Claims (11)

1. A solution comprising

(a) a substituted alkylmetal compound having the formula of M-CH 2 —W(R a )(R b ) (R c ), wherein R a , R b and R c are each independently alkyl or aryl, W is silicon or tin, and M is selected from the group consisting of lithium, sodium, potassium, cesium, manganese, zinc and magnesium, said compound having a concentration of greater than 1.0M; and

(b) a solvent consisting essentially of a hydrocarbon solvent and

an amine cosolvent.

2. The solution of claim 1 , wherein the substituted alkylmetal compound comprises (trimethylsilylmethyl) lithium (TMSCH 2 Li).

3. The solution of claim 1 , wherein the amine cosolvent comprises an amine having the formula of N(R 1 )(R 2 ) (R 3 ), wherein R 1 , R 2 and R 3 are each independently hydrogen, alkyl or aryl, and wherein, optionally, R 1 , R 2 and/or R 3 together form a cyclic hydrocarbon ring.

4. The solution of claim 3 , wherein at least one of R 1 , R 2 and R 3 comprises at least one heteroatom selected from the group consisting of O, N and S.

5. The solution of claim 1 , wherein the amine cosolvent is present at a concentration in a range of about 1 weight percent to about 85 weight percent of the total weight of the solution.

6. The solution of claim 1 , wherein the amine cosolvent is present at a concentration in a range of about 1 to about 30 mole percent relative to the substituted alkylmetal compound.

7. The solution of claim 1 , wherein the concentration of the substituted alkylmetal compound in the solution decreases by less than about 2% in 24 days when the solution is held at a temperature in a range of about 0° C. and about 40° C.

8. The solution of claim 1 , wherein the concentration of the substituted alkylmetal compound in the solution is essentially constant for 24 days when the solution is held at a temperature in a range of about 0° C. and about 5° C.

Assignments (10)