Synthesis and structure of C,N-difunctionalized sulfinimideamides

Sulfurdiimides RN=S=NR (1a,b) react in diethyl ether with two equivalents o f lithiummethyl to give dimeric C,N-dilithiummethylenesulfinimideamide ethe r adducts {Li-2[H2C-S(NR)(2). Et2O]}2 (2a,b) (a: R = Bu-t, b: R = SiMe3). M etathesis of 2b with four equivalents of Me3SiCl, Me3SnCl or Ph3SnCl yields the corresponding C,N-bis-substituted sulfinimideamides R3EH2C-S[N(SiMe3)( 2)]NER3 (3-5) (3: R = Me, E = Sn; 4: R = Ph, E = Sn; 5: R = Me, E = Si). Th e crystal structures of 2a and 2b were determined by X-ray structure analys is. Both compounds form centrosymmetric cage structures consisting, of two distorted face sharing cubes (2a: space group P (1) over bar (No.2); Z = 2 (4.0,5); 2b: space group C2/c (No. 15), Z = 4).