Tetracyclopropyltin

    Parameter     ppm  Hz

      D(A)        -0.435
      D(B)         0.349
      D(C)         0.592
       J(A,B)          6.86
       J(A,B')         6.86
       J(A,C)          9.71
       J(A,C')         9.71
       J(B,B')         7.89
       J(B,C)         -3.79
       J(B,C')         4.92
       J(B',C)         4.92
       J(B',C')       -3.79
       J(C,C')         8.46
     
     SCHERR,P.A. & OLIVER,J.P. J.MOL.SPECTROSC. 31, 109 (1969)