Analysis of nuclear magnetic resonance spectra of the type [AMXn]2, assuming JX= 0

Abstract

In order to interpret a novel five-line pattern observed in the n.m.r. spectrum of various trans-bis(di-t-butylphosphine)–metal complexes, the [AMX_n]₂ spin system, with J_x= 0, has been analysed. In order to obtain solutions capable of being analysed, it is assumed also that 2|J_M||L_AM–χL_AX|, but this assumption is not necessary if a computer is available to solve the series of 4 × 4 matrices. The solution is applied to trans-bis(di-t-butylphosphine)–metal complexes to show how ²J_P–M–P, ¹J_P–H, ³J_{P–M–P–H}, ³J_{P–C–C–H}, and ⁵J_{P–M–P–C–C–H} may be obtained.