[(HBNPEt3)4NPEt3]3+ – ein bicyclisches Penta(phosphorano)boraziniumTrikation

(HBNPEt₃)₄NPEt₃]³⁺ – a Bicyclic Penta(phosphorano)borazinium Trication (HBNPEt₃)₄NPEt₃]Br₃ ( 1 ) has been prepared by the reaction of Me₃SiNPEt₃ with HBBr₂(SMe₂)] in dichloromethane solution at 20°C. According to ¹¹B‐NMR and ³¹P‐NMR spectroscopy and to a crystal structure determination the cation of 1 has the structure of a bicyclic penta(phosphorano)borazinium‐trication. 1 _.3CH₂Cl₂: Space group P2₁2₁2₁, Z = 8, lattice dimensions at –83°C: a = 2124.8(1), b = 2307.6(1), c = 2323,1(1) pm, R₁ = 0.0733.