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Novel Tetraphosphabarrelene and ‐semibullvalene Derivatives by Reactions of 2,4,6‐Tri‐ tert ‐butyl‐1,3,5‐triphosphabenzene with Phosphaalkynes ☆
Author(s) -
Binger Paul,
Stutzmann Stefanie,
Bruckmann Joachim,
Krüger Carl,
Grobe Joseph,
Le Van Duc,
Pohlmeyer Torsten
Publication year - 1998
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199812)1998:12<2071::aid-ejic2071>3.0.co;2-m
Subject(s) - chemistry , yield (engineering) , cycloaddition , ring (chemistry) , derivative (finance) , medicinal chemistry , product (mathematics) , unit (ring theory) , stereochemistry , organic chemistry , catalysis , materials science , geometry , mathematics , mathematics education , economics , financial economics , metallurgy
2,4,6‐Tri‐ tert ‐butyl‐1,3,5‐triphosphabenzene 4 reacts with phosphaalkynes P≡C–R [R = t Bu ( 5a ), t Pen ( 5b )] at room temperature in a formal [4 + 2] cycloaddition to yield the corresponding 1,3,5,7‐tetraphosphabarrelene derivatives 8a and 8b , respectively. The analogous reaction of 4 with the aminophosphaethyne P≡C–N( i Pr) 2 ( 9 ) unexpectedly leads to the 1,3,4,7‐tetraphosphasemibullvalene derivative 10 as the only product. The single‐crystal X‐ray analysis of 10 exhibits a diphosphirane unit with a very long PP distance of 2.274(1) Å together with a large extension of the PCP angle in the three‐membered ring to 75.3(1)°.