96:
For a chain branched at the donor atom the tertiary atom will have two chains of length one and one of length one attached. The pattern can use parenthesis: () to indicate a side chain, eg NNM(N)N. For octahedral coordination there are four arrangements designated:
122:
114:
Ligands with four donor atoms on four chains around a central donor atom, will organise around the metal atom equatorially.
129:
118:
128:
2,2':6',2'':6'',2''':6''',2''''-Quinquepyridine is fairly rigid, and tries to be in a plane, so coordination will be
198:
N1-(2-(dimethylamino)ethyl)-N2-(2-((2-(dimethylamino)ethyl)(methyl)amino)ethyl)-N1,N2-dimethylethane-1,2-diamine
240:
Blackman, Allan G. (March 2019). "The coordination chemistry of acyclic pentadentate pentaamine ligands".
28:
31:
with six positions, the possible arrangements of a linear pentadentate ligand are designated by
177:
79:
93:
a is "anti" and s is "syn" for positioning of the mer arrangement relative to other donors.
8:
273:
249:
111:
where the parenthesis ow indicate how the side chain participates in coordination.
27:
There are different possible ways for a ligand to arrange around an ion. For an
253:
267:
174:
N-(2-aminoethyl)-N-(2-((2-aminoethyl)amino)ethyl)ethane-1,2-diamine
74:
where each letter f or s represents three consecutive donor atoms:
137:
133:
21:
117:
The metal may be five-coordinate with arrangements being
265:
211:Co(II), Ni(II), Cu(I), Cu(II) and Zn(II)
239:
235:
233:
231:
229:
227:
24:that coordinates via five donor atoms.
266:
224:
13:
14:
285:
188:2.65, 4.25, 7.87, 9.08 and 9.92
125:, or somewhere between the two.
140:it slightly twists to a helix.
1:
217:
7:
143:
10:
290:
254:10.1016/j.poly.2018.12.004
29:octahedral coordination
178:tetraethylenepentamine
136:it is planar, but for
123:trigonal-bipyramidal
18:pentadentate ligand
191:Mn Fe Co Ni Cu Zn
215:
214:
130:pentagonal planar
99:f(m)m f(f)f f(f)m
281:
258:
257:
237:
148:
147:
119:square-pyramidal
289:
288:
284:
283:
282:
280:
279:
278:
264:
263:
262:
261:
238:
225:
220:
146:
109:
102:
72:
68:
64:
60:
56:
52:
48:
44:
40:
36:
12:
11:
5:
287:
277:
276:
260:
259:
222:
221:
219:
216:
213:
212:
209:
207:
204:
201:
199:
195:
194:
192:
189:
186:
183:
180:
175:
171:
170:
167:
164:
161:
158:
155:
152:
145:
142:
107:
100:
89:is meridianal
70:
66:
62:
58:
54:
50:
46:
42:
38:
34:
9:
6:
4:
3:
2:
286:
275:
272:
271:
269:
255:
251:
247:
243:
236:
234:
232:
230:
228:
223:
210:
208:
205:
202:
200:
197:
196:
193:
190:
187:
184:
181:
179:
176:
173:
172:
168:
165:
162:
159:
157:abbreviation
156:
153:
150:
149:
141:
139:
135:
131:
126:
124:
120:
115:
112:
110:
103:
94:
92:
88:
85:arrangement,
84:
83:
77:
73:
30:
25:
23:
19:
245:
241:
127:
116:
113:
105:
98:
95:
90:
86:
81:
75:
32:
26:
17:
15:
203:Me7-tetren
151:IUPAC name
78:represents
242:Polyhedron
218:References
41:fff fmf fm
268:Category
248:: 1–33.
144:Examples
274:Ligands
166:Metals
138:rhenium
80:facial
206:NNNNN
185:NNNNN
134:silver
132:. For
22:ligand
182:tepa
160:type
154:name
106:f(f)m
20:is a
169:ref
163:pKa
104:and
250:doi
246:161
121:or
91:mer
82:fac
37:ffm
33:ffm
270::
244:.
226:^
65:fm
57:fm
49:fm
16:A
256:.
252::
108:s
101:a
87:m
76:f
71:s
69:m
67:a
63:s
61:m
59:s
55:a
53:m
51:s
47:a
45:m
43:a
39:a
35:s
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