The platinum(II)chlorides cis-L 2 PtCl 2 (L PPh 3 , PEt 3 ), (dppe)PtCl 2 , trans (Ph 3 P) 2 Pt(Cl)Ph, (dppe)Pt(Cl)Me and (dppe)Pt(Cl)Ph were treated with [Bu 3 MeN] 2 [SnB 1 1 H 1 1 ] (1) to give the air and moisture inert stannaborate substituted complexes [Bu 3 MeN] 2 [trans-L 2 Pt(SnB 1 1 H 1 1 ) 2 ] (2: L PPh 3 , 3: L PEt 3 ), [Bu 3 MeN] 2 [(dppe)Pt(SnB 1 1 H 1 1 ) 2 ] (4), [Bu 3 MeN][trans-(Ph 3 P) 2 Pt(SnB 1 1 H 1 1 )Ph] (8), [Bu 3 MeN][(dppe)Pt(SnB 1 1 H 1 1 )Me] (9) and [Bu 3 MeN][(dppe)Pt(SnB 1 1 H 1 1 )Ph] (10). The nearly square planar coordination at the transition metal centre in the anion of 8 was confirmed by X-ray crystal structure analysis. (dppe)PtCl 2 reacts with one equivalent of 1 to give a 1:1 mixture of 4 and (dppe)PtCl 2 . Reaction of 9 and 10 with one equivalent of HCl resulted not in the isolation of the monochloride [(dppe)Pt(SnB 1 1 H 1 1 )Cl] - (A), instead the 1:1 mixture between was 4 and (dppe)PtCl 2 isolated. From the reaction of [(triphos)PtCl][BF 4 ] and 1 a zwitterionic platinum complex (triphos)Pt(SnB 1 1 H 1 1 ) (11) was isolated.