Rear Admiral Thomas D. Davies USN (Ret.)

Lewis acid catalysis of the rearrangement of a dipalladium acetylene adduct to a vinylidene-bridged complex

“…?tyo long and two short palladium-palladium distances were found. These short metal-metal distances (Pd- (3) 1.30(7) P (3) 0.5281(2) 0.0399(2) 0.9885 (3) 1.49(7) P (4) 0.6108(2) 0.1965(2) 1.1774 (3) 1.69(8) C(1) 0.5669(6) 0.1737(6) 0.987(1) 1.7(3) C(2) 0.6110 (7) 0.1779(6) 0.919(1) 1.9(3) C (3) 0.7086 (7) 0.1043 (7) 0.842 (1) 3.2(4) C (4) 0.6607 (7) 0.2717 (7) 0.794 (1) 3.3(4) C(5) 0.4930(6) 0.0718(6) 0.8822(9) 1.3(3)* C(6) 0.6178(6) 0.2700 (6) 1.1123(9) 1.5(3) C (7) 0.3712(6) 0.1055(6) 0.962(1) 1.6(3) C(8) 0.3506(6) 0.1282 (7) 1.045(1) 2.1(3) C(9) 0.2987 (7) 0.1021 (8) 1.088(1) 3.5(4) C(10) 0.2685 (7) 0.0508 (7) 1.049(1) 3.1(3)* C(11) 0.2906 (7) 0.0258 (7) 0.967 (1) 3.3(4) C(12) 0.3413 (7) 0.0522 (7) 0.920(1) 2.9(4) C(13) 0.4105 (6) 0.1583 (6) 0.787(1) 1.7(3) C(14) 0.3540 (6) 0.1894 (6) 0.779(1) 2.1 (3) (315) 0.3276 (7) 0.2049 (7) 0.696(1) 2.2(3)* C(16) 0.3614 (7) 0.1907 (7) 0.615 (1) 3.3(4) C (17) 0.4174 (7) 0.1604 (7) 0.625(1) 2.9(4) C (18) 0.4426 (7) 0.1452 (6) (7) 0.4177 (7) 0.837(1) 2.9(3) C(28) 0.6160 (7) 0.4486(6) 0.852(1) 2.8(4) C(29) 0.6522 (7) 0.4356 (7) …”

“…The metal-metal distances for the dmpm-/memapto-bridged moieties {Pdz&$-dmpm)$-SMe)) were in the range observed for related A-frame complexes containing dmpm ligands (e.g. [Pd&l&-CO)$- (3) 4.0(1) S(2) 0.0891(4) -0.0096(4) 0.7764 (3) 3.6(1) S (3) 0.0368 (4) 0.4034 (4) 0.7061 (3) 3.9(1) S (4) 0.3413 (4) 0.2137 (4) 0.9258 (3) 3.8(1) P(1) 0.5282 (4) 0.2092 (4) 0.7632 (3) 3.7(1) P(2) 0.2716 (4) 0.0023(5) 0.6107 (3) 4.2(1) P (3) 0.0197 (4) 0.2095 (4) 0.6015 (3) 3.2(1) P (4) 0.2856(5) 0.4372 (5) 0.7483 (4) 5.0(1) F(1) 0.017 (2) 0.809 (2) 0.649 (2) 7.0(6)* F(2) -0.188(2) 0.830 (2) 0.643 (1) 6.0(5)* F(3) -0.071(2) 0.768 (2) 0.770 (2) 6.6 ( 6 ) * F(4) -0.166 (3) 0.957 (3) 0.705 (2) 12 (1) (4) 0.590(2) -0.185(2) 0.786( 1) 5.6(6) C(5) 0.451(1) 0.365(1) 0.771(1) 4.6(5) C(6) 0.674( 1) 0.165(2) 0.811(1) 5.3(5) C (7) -0.134(1) 0.221(2) 0.584( 1) 6.2(6) C(8) 0.046(2) 0.333(2) 0.514(1) 5.9(6) C(9) 0.289(2) 0.128(2) 1.030( 1) 5.1(6) 7.2(7) C(10) -0.104 (2) 0.485(2) C(11) 0.245(2) 0.574(2) 0.782(2) 9(1) C(12) 0.276 (2) dmpm)z1,l4 3.171(1) A) and also excluded support by palladium-palladium bonding. The nearly squareplanar coordination environment around each palladium center was completed by four bridging SCH3 groups.…”

Controlling macromolecular structures towards effective antimicrobial polymers

“…1B) [1,6]. The most prominent issue is the expeditious growth of acquired resistance in bacteria that cause major healthcare crisis.…”

“…The most prominent issue is the expeditious growth of acquired resistance in bacteria that cause major healthcare crisis. For example, since the introduction of the first b-lactam antibiotics, the number of unique b-lactamase enzymes has grown from zero to over 1000 [6]. Decades of use and misuse of antibiotics, combined with a forty year lull in the pipe line of novel antimicrobial agents, have consequences of a global superbug threat that could lead human civilization to a pre-antibiotic era.…”

Disabling Romanticism

“…184, 186, 199), a man so isolated that he laments, 'Why do I live..?' (208). To borrow David Mitchell's language, these (and many other) late eighteenth-century authors use the disabled body to comment on 'social ills' and to 'access concerns on a metaphysical scale' (24-25); as a result the poems forego commenting on the nuanced realities of non-normative embodiment.…”