| CO Complex | DOI | CCDC code |
| chromium(0) | doi.org/10.1107/S0567740875008394 | FOHCOU01 1158524 |
| molybdenum(0) | doi.org/10.5517/cc6f4sj | FUBYIK01 191387 |
| tungsten(0) | doi.org/10.5517/cc44xgm | KOVSOD01 123890 |
| manganese(I) | doi.org/10.1021/ic700798z | TINFAY 644834 |
| technetium(I) | doi.org/10.1107/S1600536808025208 | BOFQUJ01 675277 |
| rhenium(I) | doi.org/10.1039/dt9780001627 | FUZJOZ 1162205 |
| iron(II) | doi.org/10.1021/ic0482483 | CEHHON 232217 |
| ruthenium(II) | doi.org/10.1021/ic040115u | LARPAW 281080 |
| osmium(II) | doi.org/10.1021/ic0482483 | CEHHIH 2322167 |
| vanadium(-I) | doi.org/10.1007/BF01667030 | TIRQAM 271400 |
| niobium(-I) | doi.org/10.1021/ic00155a009 | BILNEP10 1111024 |
| tantalum(-I) | doi.org/10.1021/ic00155a009 | BUVGII 1117448 |
| titanium(-II) | doi.org/10.1021/ja00172a017 | SIDGIV 1258653 |
| zirconium(-II) | doi.org/10.1021/ja00172a017 | SIDGOB 1258654 |
| hafnium(-II) | doi.org/10.1021/ja00172a017 | SIDGUH 1258655 |
| iron(0) | doi.org/10.1107/S0365110X62003771 | FOJBOV 1158628 |
| ruthenium(0) | doi.org/10.5517/cc783l5 | FOKNEY06 216336 |
| osmium(0) | doi.org/10.1021/ic50170a032 | FOKBUC01 1158742 |
| Fe2(CO)9 | doi.org/10.1039/dt9740000800 | FUZGAI 1162195 |
| Fe3(CO)12 | doi.org/10.1021/ja00820a016 | GAFMEF01 1162674 one-half |
| manganese(-I) | doi.org/10.1016/S0022-328X(00)90652-1 | FUDKAQ 1160544 |
| rhenium(-I) | doi.org/10.1021/ic2003035 | EZILOP 812642 |
| chromium(-II) | doi.org/10.1039/D1CP01592C | ISAXEG01 2059985 |
| molybdenum(-II) | doi.org/10.1039/D1CP01592C | AZUQOE 2059986 |
| tungsten(-II) | doi.org/10.1021/om00127a009 | |
| cobalt(I) | doi.org/10.1002/anie.200250780 | UJISEL 199269 |
| rhodium(I) | doi.org/10.1021/ja993628m | GONLAW 1170018 |
| palladium(II) | doi.org/10.1021/ja002360s | QEZTAQ 160077 |
| platinum(II) | doi.org/10.1021/ja002360s | QEZTEU 160078 |
| nickel(0) | doi.org/10.1021/om00028a082 | FOJBUB02 1158633 |
| cobalt(-I) | doi.org/10.1021/om0340701 | BEHVOA 226591 |
| iron(-II) | doi.org/10.1021/ja00446a022 | NCRYFE 1217933 |
| copper(I) | doi.org/10.1021/ic990321f | MEBNIQ 1210594 |
| manganese(0) | doi.org/10.1107/S0567740882001939 | FOJCEM01 1158636 |
| technetium(0) | doi.org/10.1134/S1066362211010061 | FOKCIR01 1055457 |
| rhenium(0) | doi.org/10.1021/ic50219a056 | FUZTOJ 1162244 |
| chromium(-I) | doi.org/10.1107/S0108270195001454 | HIFFEH 126339 |
| molybdenum(-I) | doi.org/10.5517/cc59b70 | QOVDAG 157921 |
| tungsten(-I) | doi.org/10.1039/D0DT01921F | SUSSIL 1953958 |
| cobalt(0) | doi.org/10.1107/S0365110X64001803 | FOHDEL 1158529 |
| rhodium(0) | doi.org/10.1021/ic50081a030 | FOWTIU 1159842 |
| iridium(0) | doi.org/10.1021/ic50190a040 | FOJVEF 1158714 |
| cobalt(0) occasionally | doi.org/10.1039/b915083h | YUGWUT 737632 |
| Co4(CO)12 | doi.org/10.1016/S0022-328X(98)00879-1 | FOWTEQ02 122744 |
| iron(-I) | doi.org/10.1016/j.jorganchem.2012.07.040 | SENCAR 884879 |
| ruthenium(-I) | doi.org/10.1021/om00127a041 | QANJOI 2115042 |
| osmium(-I) | doi.org/10.1021/om00127a041 | DELHOR 1138573 |
| titanium(0) | doi.org/10.1002/chem.201905552 | |
| vanadium(I) | doi.org/10.1016/j.cplett.2008.03.017 | |
| niobium(I) | doi.org/10.1038/s41557-020-0487-3 | XUTBOG 1909275 |
| tantalum(I) | doi.org/10.1038/s41557-020-0487-3 | XUTCAT 1909276 |
| tantalum(0) | doi.org/10.1038/s41557-020-0487-3 | XUTBIA 1909274 |
| nickel(-II) | doi.org/10.1002/zaac.201800111 | ZIYKAW 1526303 |
| platinum(-II) | doi.org/10.1002/zaac.202100378 | ADEGUP 2103387 |
Some electron counting problems | ||
A Mn(CO)5Cl | doi.org/10.1039/j19710001559 | ZOSWEJ 1315279 |
| Re(CO)5Cl | doi.org/10.1107/S0108270183009014 | FOHCAG 1158516 |
| Cr(CO)5I- | doi.org/10.1007/s11243-005-1018-1 | NATZIS 251204 |
| W(CO)5I- | doi.org/10.1039/a700215g | RAGJEO 1246320 |
| W(CO)5py | doi.org/10.5517/cc3sk8p | FACPII01 112972 with added H |
| W(CO)5(PH3) | doi.org/10.1021/om020311d | XIBVUZ01 190775 |
B Mo(CO)4I3– | doi.org/10.1039/dt9860002569 | FEYKOJ 1155481 |
| W(CO)4I3– | doi.org/10.1002/anie.200602617 | CEZFAP 606431 |
| Mo(CO)3I2(MeCN)2 | doi.org/10.1023/A:1006985429084 | HORKUU 103352 |
| W(CO)3I2(MeCN)2 | doi.org/10.1016/S0277-5387(00)80560-4 | GIFGAD 1167544 |
| Mn(CO)5H | doi.org/10.1021/ic50079a025 | FOKCEN02 1158747 |
| Cr(CO)5H– | doi.org/10.1021/ja00389a013 | BOSKOJ 1114173 |
C cis-Fe(CO)4I2 | doi.org/10.5517/ccr5232 | CUCQIB 690063 |
| trans-Cr(CO)4(PPh3)2 | doi.org/10.1016/S0022-328X(01)00929-9 | OCUHID 163156 |
| fac-Fe(CO)3I3– | doi.org/10.1016/j.inoche.2009.04.006 | GUHZUF 743307 |
| mer-Re(CO)3H(PPh3)2 | Zeitschrift fuer Kristallographie Crystalline Materials (1992) 202, 317 | PARFIX 1228290 |
D Fe(CO)4(PPh3) | doi.org/10.1021/ic50203a033 | PPTCFE 1237877 |
| Fe(CO)3(PPh3)2 | doi.org/10.5517/cc9g9lm | LETLEC 281870 |
| Cr(CO)4(PMe2CH2CH2PMe2) | doi.org/10.1524/zkri.1994.209.1.77 | PINVAJ 1234099 |
| Ru(CO)3H(PtBu2CH2CH2PtBu2)+ | doi.org/10.1039/b415812a | FIGZOL 250932 |
E Mn2(CO)8Br2 | doi.org/10.1107/S1600536806005885 | FOHDIP01 1431757 |
| Re2(CO)8I2 | doi.org/10.1016/S0022-328X(00)93314-X | FOLHOD 1158870 |
| Nb2(CO)8Cl3– | doi.org/10.1039/C39820001304 | BIXDIV 1112095 |
| Nb2(CO)8I3– | doi.org/10.1002/cber.19921250505 | VUDYEY 1287394 |
| W2(CO)8Cl3+ | doi.org/10.1039/C9SC06445A | LUMQES 1952387 |
| W2(CO)8Br4 | doi.org/10.1016/10.1021/ic00198a017 | FURYOG 1161575 |
F Os2(CO)8I2 | doi.org/10.1016/S0020-1693(00)83380-0 | GEHDOM 1165426 |
| Re2(CO)8(PPh3)2 | doi.org/10.1021/om4010127 | GIYQOW 984973 |
| Mo2(CO)8I2 | doi.org/10.1107/S0567740876003452 | FOPHUN 1159215 |
| W2(CO)8(PPh2)2 | doi.org/10.1021/ja00246a018 | DIMHIQ10 1141116 |
G Mn3(CO)14– | doi.org/10.5517/ccdc.csd.cc2c2xw8 | YAZDOW 2177560 |
| FeRe2(CO)14 | doi.org/10.1107/S0108270190011258 | GIPSON01 1168398 |
| Re2Pt(CO)12 | doi.org/10.1021/ic00187a011 | FUZWIG 1162254 |
| Os3(CO)12I2 | doi.org/10.1007/s10876-012-0532-5 | FUZHEN01 896125 |
H Ru3(CO)10(PPh2CH2CH2PPh2) | doi.org/10.1016/S0022-328X(02)01567-X | CUSHAZ01 177736 |
| Ru2(CO)8Pt(PPh2CH2CH2PPh2) | doi.org/10.1007/BF00702713 | LAWCUH 1204020 |
| Fe2Co2(CO)11(PPh)2 | doi.org/10.1002/cber.19831160333 | BADWOS10 1104911 |
| Co3(CO)6(PPh2)3 | doi.org/10.5517/cc46rz1 | QAFZUS 125673 |
I Fe4(CO)16Pb | doi.org/10.1021/ic00268a017 | FORYEQ 1159437 |
| Fe4(CO)16Sn | doi.org/10.1039/j19670000382 | VEPFEC 607539 |
| Fe4(CO)16Ge | doi.org/10.1016/S0022-328X(00)99431-2 | PEQNEE02 607538 with fixed O3A |
| Fe4(CO)13–2 | doi.org/10.1039/b703628k | CIFXAR 639853 |
| Re6(CO)18(PMe)3 | doi.org/10.1039/C39850000478 | CUSVIV 1133765 with added H |
| Ni8(CO)8(PPh)6 | doi.org/10.1021/ja00432a072 | CONPOS 1129493 |
J Mn4(CO)12Br4(pz)4 | doi.org/10.1021/om201244a | BEJPAJ 851351 |
| Re4(CO)12Br4(pz)4 | doi.org/10.1039/b101992i | UDAVOK 160973 |
| Os4(CO)16 | doi.org/10.1021/om00160a024 | GABTUY10 1162367 |
| Os4(CO)15(PF3) | doi.org/10.1021/om00160a024 | VIBLEX 1283210 |
| Tc4(CO)12Cl4 | Radiokhimiya (1994) 36, 199 | POSLOY10 1237191 |
| Re4(CO)12F4 | 10.1071/CH9810737 | FOVPIP 1159717 |
K Co6(μ6-C)(CO)15–2 | doi.org/10.1039/dt9850000035 | CUZNOA 1134380 |
| Rh6(μ6-C)(CO)15–2 | doi.org/10.1039/dt9730000651 | CBRHAM10 1121478 |
| Fe5(μ5-C)(CO)15 | doi.org/10.1021/ja00883a004 | FUZBAD 1162174 |
| Ru5(μ5-C)(CO)15 | doi.org/10.1039/c39810000415 | CAQQEQ 135027 |
| Os5(μ5-C)(CO)15 | doi.org/10.1039/c39800000564 | CAQQOA 135024 |
| Re4(μ4-C)(CO)15I– | doi.org/10.1039/c39850000978 | DAJBIZ 1135646 |
| Pd3(μ3-CO)(μ-PPh2CH2PPh2)3+2 | doi.org/10.1039/C39830001336 | CASMUE 1120566 with added H |
L MnFe(CO)8(PH2) | doi.org/10.1021/om100736m | OMASOL 815724 |
| W2(CO)10Sn(py)2 | European Journal of Inorganic Chemistry (1998) 703 | POZCEM 1237702 |
| Fe3(CO)12(AsH)-2 | doi.org/10.1021/om00002a029 | WICHUL01 1293153 |
| Mn3(CO)13Br(PH) | doi.org/10.1107/S0108270197000735 | REMREG 128833 |
M Co2(μ2-CO)2(η5-C5H5)2 | New Journal of Chemistry (1988) 12, 621 | GOBYEB 1169493 |
| Cr2(μ2-CO)3(η6-C6H6) | doi.org/10.1002/cber.19851180509 | DEHMEI 1138251 with added H |
| Co3(μ3-CO)2(η6-C6H6)3+ | doi.org/10.1021/ja00284a033 | FAGPAE 1151715 |
| Fe4(μ3-CO)4(η5-C5H5)4 | doi.org/10.1021/ja00765a021 | CPFTEC 1131090 |