Phosphorus-arsenic bonds

Driess, Matthias, Silicon-Phosphorus and Silicon-Arsenic Multiple Bonds. 39 193... 

Silicon-Phosphorus and Silicon-Arsenic Multiple Bonds... 

There is a recent review of two-coordinate phosphorus complexes.306 Malisch et a/.307 observed the reversible reaction (86), in which a metal-arsenic(III) double bond is formed, i.e. the M—As a bond is augmented by the arsenic lone pair to form a n bond system (since the cyclopentadienyl coligand is not coplanar with the M=As, the arsenic double bond is isolated). Complex (58) undergoes reactions typical of double bond molecules (Scheme 14). Phosphorus analogues have also been prepared (Scheme 15) the crystal structure of product (c) in Scheme 15 has been solved (59a). The d(W—P) of 2.181 A is shorter than the predicted rf(W=P) of 2.26 A, and the trigonal planar coordination of phosphorus indicates sp2 hybridization.308... 

Element-element bonds, addition to G-G multiple bonds arsenic—selenium bonds, 10, 782 boron—boron bonds, 10, 727 boron—sulfur bonds, 10, 778 B-S and B-Ge bonds, 10, 758 chalcogen—chalcogen additions, 10, 752 germanium—germanium bonds, 10, 747 germanium-tin bonds, 10, 780 overview, 10, 725-787 phosphorus—phosphorus bonds, 10, 751 phosphorus—selenium bonds, 10, 782 phosphorus-sulfur bonds, 10, 781 Se-Si and Se-Ge bonds, 10, 779 silicon-germanium bonds, 10, 770 silicon-phosphorus bonds, 10, 780 silicon-silicon bonds, 10, 734 silicon-sulfur bonds, 10, 779 silicon-tin bonds, 10, 770 tin-boron bonds, 10, 767 tin-tin bonds, 10, 748... 

Phosphorus—phosphorus bonds, addition, to alkynes, 10, 751 Phosphorus rings, chromium carbonyl link arsenic rings, 5, 226 As, Sb, Se, Te, Sn rings, 5, 226 boron rings, 5, 222 carbon rings, 5, 224 characteristics, 5, 221 oxygen rings, 5, 227... 

The cyano- complex of univalent gold, Au(CN), has been mentioned in connection with recovery of the metal. Other stable derivatives of this valence state are complexes with gold-to-sulfur, gold-to-arsenic, and gold-to-phosphorus bonds. The structures pictured below may be regarded as representative ... 

A series of compounds with general formula [RMAs(t-Bu)2] (R = Me, r-Bu M = Zn, Cd, Hg) has been studied and it was found that their stability decreases in the order Zn > Cd] Hg. Table 12 summarizes some representative average bond distances and bond angles found in organozinc compounds containing a phosphorus-or arsenic zinc bond. 

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