Jg. Hinman et al., [{ReH2(PMePh2)(2)}(mu-H)(3)](-): The first member of a new class of anionic polyhydride dimers [Re2H7L4](-), INORG CHEM, 40(11), 2001, pp. 2480
[K(Q)] [{ReH2(PMePh2)(2)}(2)(mu -H)(3)] is prepared by treatment of {ReH2(P
MePh2)(2)}(2)(mu -H)(4) with potassium hydride and a crown ether (Q = 18-cr
own-6 or 1,10-diaza-18-crown-6). The [K(1,10 diaza-18-crown-6)](+) salt con
tains NH . . . HRe protonic-hydridic bonds and has been characterized by P-
31 NMR, variable temperature H-1 NMR, IR, and X-ray crystallography. The pK
(alpha)(THF) = 33 of {ReH2(PMePh2)(2)}(2)(mu -H)(4) was determined on the b
asis of its reaction with [K(2,2,2-crypt)][PO(OEt)(2)NPh].
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