The new nonsymmetric ditertiary phosphanes, Ph 2 PCH 2 N-(R)CH 2 PAd [3a: R = C 6 H 5 , 3b: R = C 6 H 4 (4-CH 3 )] were prepared using a three-step sequence of condensation reactions. Hence treatment of AdP-H (AdP-H = 1,3,5,7-tetramethyl-2,4,8-trioxa-6-phosphaadamantane) with (CH 2 O) n at 110°C gave the adamantane-derived hydroxymethylphosphane 1, which upon condensation with C 6 H 5 NH 2 or C 6 H 4 (4-CH 3 )-NH 2 gave the secondary aminophosphanes HN(R)CH 2 PAd [2a: R = C 6 H 5 , 2b: R = C 6 H 4 (4-CH 3 )]. Further condensation of 2a or 2b with Ph 2 PCH 2 OH gave 3a or 3b in high yields

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Base induced P,N-chelation, C-C coupling and methylene C-H deprotonation affords an unusual fluorene containing square-planar Pt(II) complex Pt(kappa4-P2N2-Ph2PCH=NNCC12H8)2 which has been isolated and structurally characterised.

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